[DizzyPope]

Just installed the B6 set a couple weeks ago. I don't know why Jeep doesn't just put these, or an equivalent on the Cherokees to start.
Ride is wonderfully tight on the streets (in LA ). Haven't been off road with them yet since I'm working on a coolant leak issue before heading out to the desert.

Warning, Be careful if you have a lift kit already installed. Something seems to get fishy with the struts, but they do go in with capable hands.

 

[DizzyPope]

...curious if anyone else has tried both and has an opinion on the relative harshness of the B4 vs B6 vs stock on an average shitty street filled with expansion joints, manhole covers and potholes, and highway speed expansion joints.

The stock shocks feel harsh on low-speed streets, but I don't notice expansion joints on the highways around here like I do with the RV so for me the stock setup is more of a lower-speed harshness problem. It may also be more related to the relatively stiff swaybars than the shocks, which may make all the shocks feel about the same at lower speeds, I.e. potholes at 30 mph.

I just went from the stock struts to B6s. I wish they were there to start from the factory. The ride is more solid all around on the junk streets here in LA county. Haven't been off road with them yet, but I know they will continue to make me smile there. That said, I do not expect rocks or narrow rut-type bumps to be any different with them though, including washboard. I think those pinpoint shockwaves are too "high frequency" to be damped by anything on most suspensions especially at low speeds.

It's tough to gauge what you are looking for though in a Cherokee (or anything that size), with expansion joints and potholes like that at low speeds. It's the bigger holes and other uneven pavement damage that the struts and shocks eat up for snacks at any speed. The B6s love that stuff.

 

[DizzyPope]

You already made the excellent decision to drive a Cherokee over a CrossTrek. Really the two shouldn't be compared, so I won't go there. Upgrading to B6s is your next excellent choice. You'll be looking for bad pavement to tackle during that 99% of the time 😂
Like I said, Jeep should have put B6s or their equivalent on the Cherokee to start.

Wish you the best.