Here is a list of the other washers I've tested to date, in no particular order:

• Craftsman CMXGWAS020733: This is a good basic cleaning unit at a low price. I especially like its power cord pull location compared to most washers. Still, the lighter-duty feel of the upright form factor, plastic housings and missing yellow tip mark this one down.
• Generac 8874: Lowest cost of the gas-powered group with a good wand option. No onboard detergent tank, missing yellow tip, plastic housings, loose spray wand storage and unbalanced wheel alignment prove that you get what you pay for. 
• Ryobi 803001: Priced in the middle of the group with a good attempt at a multi-nozzle tip option, the Ryobi sports the smallest engine specs and otherwise has OK cleaning power, enough to get the job done.
• Simpson MSH3125: One of the higher-priced units, with solid metal parts and a low center of gravity. Otherwise, no onboard detergent tank, loose spray wand storage, and (at least on my unit) more than normal engine vibration.
• Teande 4200PSI: Looks great on paper and does actually include all five basic nozzle tip types and a neat double reservoir. You have to survive the tedious assembly and still be OK with loose spray nozzle wand storage as a tradeoff. The specified high pressure of 4,200 psi offers no real-world advantage over the other washers rated at about 1,000 less psi.
• Greenworks Pro 2300: I tested both the 2,300 and 3,000 psi versions of the Greenworks Pro electric pressure washer series. The 2300 performs well; about what you'd expect. Very few of the electric pressure washers come with the zero-degree red tip, so if you're not looking for that concentrated flow out of the box, but still want a mid-tier option, the 2300 is a decent choice.
• Greenworks Pro 3000: Jumping up to the 3000 from the 2300 Pro series from Greenworks, you can feel the difference and increase in performance between the units. I'm also a fan of the lower and wider body style used here like we've seen with Tacklife and DeWalt. There is a bit of a price jump, but if you're going electric and your pressure washer load is on the heavier side, it would be worth the cost increase.
• Rock&Rocker 3500: This is the lowest-priced option of the units we've tested. Although it touts a maximum psi of 3,500, it doesn't feel like it operates anywhere near that number (it does list its nominal psi as 1,850). If you can overlook that, it's not bad for $130. It does have a couple of features I'd like to see more of -- namely the built-in hose reel as well as added support for the spray wand. 
• Chemical Guys ProFlow PM2000: I do like these suitcase-style bodies -- they're more actively mobile than the traditional body style, and lighter (also a big fan of the rotating casters). Although this unit isn't particularly powerful, my main gripe here is with accessory storage. This is the only unit that doesn't seem to have any type of accessory storage built in, for the power cable, spray wand or hose attachment. It does have a spot for the small interchangeable spray tips, but not for everything else.
• DeWalt DWPW2400: This pressure washer, like most DeWalt products, feels solid enough, but I will say that its spray performance did feel a bit underpowered for its stated specs. I have no real issues with its performance otherwise. A solid buy, but one I feel deserves a slightly lower price.
• Craftsman CMEPW2100: Another solid buy at $220 and probably my second-place pick for value buy in electric pressure washers. Good hardware, good performance. Also maybe one of my new favorite features for accessory storage. The spray wands always seem to be loosely stored, rocking about, or falling off. The CMEPW2100 utilizes a tab and slot design to hold the wand securely. I love it.
• Craftsman CMCPW350D1: Another cordless power tool adaptation into pressure washers. This unit is lighter than its DeWalt cousin, at the cost of about 40% stated power in psi. Like the DeWalt, if portability is your main checkbox and you're a Craftsman power tool user; it's a decent grab at $149. Also, this unit has a great five-in-one nozzle tip.
  

With each washer, I used multiple nozzle tip varieties for each activity. I started with a section of concrete driveway. The green tips were often too light to get the surface as clean as it could be. The red tips, although effective, only clean a small area at a time. Enter the yellow tip, which provides a great balance of focused pressure and spray width. Although there's only a difference of a few hundred psi between most of these washers, there were occasionally noticeable differences between them when I used the same tip. My best guess is there's a difference in the manufacturing of the tips themselves. The most consistent tip is the 0-degree red tip. With so little room for variance, the red tip felt the most consistent between units overall. Every washer was an appropriate surface cleaner for the concrete, but it was most difficult for the ones that left out a 15-degree tip (so you then had to rely on the red tip).

After the driveway test, I ran each washer through a gauntlet: where the large concrete slabs meet each other to form my driveway, I've let the happy little weeds grow in anticipation of this day. No weed was a match for any pressure washer with a red tip until you get to the electric units. Their lower psi means they will struggle with some of the tougher weeds. 

I had a couple of wood options to try out. The first was a hardwood-based plywood. The second was a section of 1x12 construction-grade lumber (mostly pine around these parts, I believe). One thing I can tell you: Never use a red tip on wood. The jet spray rips through it like a tiny tornado. Once I backed down to the yellow tip, it was interesting to see how the water could bring back a fresh-cut appearance. Even the yellow tip will begin to skin these boards if you hold it in place for longer than a second or two. Most other tips are appropriate for wood applications. 

The bigger surprise for me came with vinyl siding. I staged a small wall with some basic (read: cheap) vinyl siding. I was excited for the carnage to come, but it never did. I tried to damage that siding -- 4,200 psi with a red tip at point-blank, the best I had -- but there wasn't a scratch. Pressure washers are wonderful options for cleaning vinyl siding; they are so much faster and more efficient than any manual method. I'd always worried about accidentally chewing through the siding if I got too close or chose the wrong tip, but my concern was misplaced. I still wouldn't recommend going after your siding with a red tip, but most anything else should be fine if you follow the manufacturer's guidelines. 

If you're planning on using a pressure washer regularly, here are a few tips. Know what your target uses will be. Plan your purchase around those. For me, that includes looking at aftermarket tips. There are a lot of options out there to make your life easier. Detergents can help. If in doubt, start with the white 40-degree tip and work your way up. Wear protective gear. Consider other upgrades if you'll be spending lots of time behind the spray, such as a new wand or high-pressure hose. Also, if you're new to the game, check out my beginner's guide to pressure washing.