How bad is the Mooer one? Their capture software looks good, but their pedals have a lot of latency usually. Not sure if you can switch with midi
No clue about their "X2" unit, but I have the old 4-button Preamp Live. It's a shame, because at least for clean sounds, it was pretty good while it worked.
It's pretty much bricked, after it started giving white noise instead of the actual signal. Fortunately, I bought it used and it was cheap, 120-150 € maybe? Don't remember.
Feature-wise it's decent enough. Amp, Line and XLR outputs (both with separate, optional cab sim!!!), 1/4" headphone out, quick and easy "profiling" (EQ curve matching, actually), FX loop, pre- and post- noise gates, lots of models, desktop and phone apps (trashy, very "Chinese" UI, but useable).Line
I've never used the Midi connection, though, so I can't comment on that.
I remember profiling my LAB Series amps using a clean Fender Twin profile, and A/B-ing through the FX loop sounded 100% spot-on. Took about 5 minutes, which is awesome.
The higher-gain models were all really noisy (I'm a humbucker guy, fwiw), to an extent that I found almost unusable, since its noise gates are rather "conservative" and can ruin the fun a bit.
I once tried profiling an amp with a Catalinbread SFT in front, and it wasn't as exact as capturing clean sounds, still alright for band rehearsal though, maybe even gigging.
EDIT: The Mooer Preamp Live turning into a white noise brick seems to be a common problem, I'm afraid. I did research it further, and there doesn't seem to be a good solution, other than trying a complete wipe - some say it worked for them, some say it didn't (like myself, for instance). Apparently, some of the parts inside have a short lifespan.