The stomps seems better sounding and the only new one i noticed was the "yellow box" which i assume is another one of boss' OD's. 2 knobs i believe. I can't even turn the amp on today because out power went out and when it came back none the house's outlets work except one and if i plug it into that outlet it hums like crazy due to my computer being in the same strip. So no amp today. But that was the only stomp i noticed. As far as modulation, the only one i noticed thats different is it has a phase 90 that actually sounds quite good. Not sure how many effects can be used simultaneously because i have no manual and the menu just shows a + sign meaning you can add one. Then when you do another plus sign shows up next to the effect u just added. then add another and another plus sign next to that. So how many can be stacked i haven't tried but to know you'd have to keep adding till no more plus signs show up or read the manual once it comes out. But i have stacked more than one stomp so thats doable. All the effects i've tried so far seem much better then the V2's. And yes, the EXP-1 works with it but with no manual released yet and nothing in the quick start guide, i can't figure out how to make it work. I found the EXP-1 menu in the amp but it's confusing and nothing i tried so far works. So i'll have to wait for the proper manual. re said probably a couple weeks. But it has a menu for the exact model in the amp's setting..,"EXP-1", so obviously it will work with it. The only downside is no 2 button switch support. I used that for atch up.down which was convenient at home but i only use one patch in a band context so no biggie for me. But a drag for those who like to switch patches live and want the 4 button to be in a different mode for other things. At this point i'm feeling like the amp is a well worthwhile upgrade from the V2. At first i wasn't sure but once i spent a day with it and started learning how to dial certain models in optimally i started hearing some really nice improvements in the basic tone quality of the amp that weren't as apparent till then. This amp's a keeper. And by the way, taste in aesthetics aside as far as what you like, quality wise those who call it cheezy looking haven't had a chance to take a long look in person. Mine sits next to my V2 for now and in a side by side comparison the GT looks way more quality than the V2. It;s not as much amp like in looks as it is high end audio gear looking. So that may be a turn off to some. But quality wise it looks quite sweet. i like it. only complaint there is the cheap flimsy plastic logo. Fender used that same logo a few years ago on some of their gear especially some bass cabs, but they were really nice made out of metal. Wish they'd used that.I can see this one disintegrating it you bump it.