You’ll get more detail but lose some warm and bass response. I had the Nios for a couple years and never heard anything like them, still love them for certain music. Upgraded to the u12ts and at first thought, “What have I done!? The bass is muted and the detail isn’t that much better.” It took some time for my ears and brain to adjust. It wasn’t until going back to the Nios that I truly appreciated the difference. It’s honestly like going back to an LCD screen after using an OLED, you just don’t realize what you were missing. You can warm up the u12ts with cables and the right amp. The Nios will never have the technicalities. At the same time the u12ts will never have that bass, it’s a limitation of the hardware. It depends on what you’re looking for. As for my question, I’m looking for both, because I’m greedy
And have heard the Trios may be the best of both worlds. If you’re looking for detail and can lose a bit of bass (the u12t’s bass is still fantastic) you’ll never regret the upgrade to the u12ts. If you’re a bass head, totally legit, you may regret it. That’s what’s great about the classifieds here, you can get stuff second hand and resell it if you don’t like it for almost the same price you paid. As for me, I may try the Trios but am honestly thinking of just going custom u12ts, they really are end game, if you’re looking for one. Most people on here aren’t looking for an end game though, even if they claim they always are, haha.