Well, I just returned from my local store where I went to try out the Uber 410 cab, pretty prepared to buy it. While there, they had the Uber410 sitting atop a GB XB-3 410 cab. I used to own a GB 410-XB2, very nice cab but I moved it once I bought two GB Neox 212T cabs mostly due to portability, still have the two Neox 212T's.
So I was running one side of the Max 12.0 into the Uber, using a store's Am St P5; I own the same bass. Amp was set all flat but also with the Lo-Hi signal shapers in after awhile, that's how I ran my GBE 600/750 and now my Neopack. So I ask the dude to let me try the XB3 cab just to compare.
WOW, I was pretty blown away by what I heard outta that little 410 cab using the same bass-settings as I had with the Uber 410. Now to me, the Uber sounded maybe louder but the XB3 just sounded lower, tighter and overall nicer to my ears. If it matters the Uber was sitting atop the XB3 off the floor, so the XB was on the actual floor. The seemingly louder Uber was facing my face as I sat on a stool while I tried the cabs the XB3 at my feet.
There was a young dude next aisle, slappin da bass. So I asked him to pls come hook up that jazz 5 active into the head so I could walk away to listen. Again, I felt like that XB cab just had such a nicer tone to my ears as I walked away and left n right of the cabs.
I'd only seen a couple of threads here that even mention the XB3 and I did not follow up cause I just thought it was a new version of my old XB-2. The cab seems quite smaller than my old XB3. I felt it sounded much better than my older XB3 but kinda hard to recall. I did not know the XB3 cab so I asked salesdude if it was a new, neo cab, he said yeah. Well, after a search here just now, I see he's wrong, big surprise there.
I asked him for walkout prices for each cab, he did OK on the Uber; only $100 off the XB3. But when I said earlier, I was about ready to buy the Uber, he prolly wanted to keep his commish in that same area $$-wise, I can understand that. But I did not want to buy the XB3 without knowing more about it. So I left and came straight home to search TB, not alot out here on the XB3.
But at least I now know more of it from the specs I found in a thread here. AND after all the great stories/threads I've read of the Uber410, I can't believe I preferred the less-expensive-lower power rated XB3.
I know, I know, specs are very helpful and say alot about the product but I've always used my ears to buy new/used gear while still considering the products specs. Now, I've been using my Eden 410xlt cab lately with LMII or F1 so maybe that, tighter tone the XBE410 gave me more felt more familiar, IMHO. The Uber cab did seem louder and of course this was in a med size store but the XB3 did not lack for volume and offered a very nice tone that I preffered.
I can't seem to find any XB3's at online stores. I prefer a store that lets me return the cab, this local store offers store credit or just a trade in, no cash back

The specs read alot like my XB-2 cabs specs from what I recall, I forget the weight of the XB2 to know if its close or not.
So sorta my main question; is the XB3 a brand new cab, just a remade-smaller cabbed-XB2 and most importantly, are my ears wrong this time and is the Uber cab really that great over other GB cabs and I'm missing something here? And as always in fairness I could not crank the cabs up a whole lot in this store, vibrations all over, glass front wall. Maybe the Uber will blow the XB3 away in real life at gigs and the XB3 will give out since it seems much tighter(??) and I get no PA support. That is in the TX blues band where I felt the Uber tone will work out well. Heck of an expensive lesson to learn finding it out at a gig.
I felt like I heard alot of my GB Neox 212T in the Uber and I've been eyeing Epi-Bergy and others just for a new toned, 410. I'll keep searching here now for more info on the XB3, I've done alot of reading up on the Uber cab here and I'm a little confounded now with what I just experienced. I know I'm stating my preference here on a short but what seemed like a very telling sound check using my ears and def no expectations with the XB3 cab at least. Thanks for any input to this longa$$ thread. Peace.