Ok, I guess I can give a shorty review based on first impression. Keep in mind this is in direct comparison to a bxt stack, consisting of 410, and 115. And we're talking about a 3101212 being driven by a plx1602 bridged with a compressed svp-bsp preamp on a maple cirrus.
Volume obviously is not a problem. I've never had a problem getting loud clean volume from the bxt stack either.
Initial tone and response, a bit darker, much more middy and punchy, not as clean and clear up high.
I dialed in the tweet a bit and messed with some eq'ing and got it close to the sound I liked on the ampeg stack, but still not as clean on the highs, and getting them to cut through without being tinny or biting is a bit tricky, but I got pretty close.
It does lack a bit of the deep shake your booty lows that the full stack can get, but the midbass bump is pretty tight and hits pretty hard, it took a bit of getting used to, but dialing it in through the night I got a sound I liked and found acceptable, I was however wearing earplugs the entire time, so my hearing was a bit skewed.
I like the sound, and I don't have to drive it very hard to get a good volume in the room, and obviously because of the angled 12's, I can stand off to the side and over by the guitar rig, and still hear my lows fine and play with confidence, that doesn't happen with the ampegs. I have to stay right in front.
The jury is still out on which I prefer, I can only keep one setup in the long run, and I really like the idea of a single cab to lug around, instead of two really heavy ones. My drummer says he likes the tone with the ampegs more, and I have to agree, to a certain extent. They do have a more natural hi-fi vibe and are really clean even at high volume, and get pretty deep almost dubby lows that the 3101212 struggles a bit to get since it is so responsive with the low mids. But the schroeder definitely doesn't sound bad, and I can dial in a tone rather close to the bxt's. but it projects more and fills a room more, but maybe at the sacrifice of a bit of hi-fi quality, certainly not volume.
In the real world, that characteristic probably is more useful than dubby lows on stage, and will really fill a club with sound. I definitely need a bit more time and tweaking to make my final decision, Either one is very good, and of course as has been mentioned a thousand times here, is a matter of preference, and what works in the real world.
I'd love to hear a 1210 or 1212 up against the 3101212 and see how they compare in tone, and even volume. Having one handy for smaller gigs would surely be nice instead of lugging around a 3101212.
I hope this is all helpful and coherent, and not too long winded. I'll post more feedback as I get more time with it. Unfortunately most of this evening was spent working on some new ideas, and not running through the set so I didn't get a true idea of what it can do when we're on the ball and in full swing.
Troll
, my Carvin B1500 will be delivered somewhere next week 
