Difference is more remarkable under "sport" mode. Otherwise while in "D" smashing the pedal is about the same.
As mentioned 1.5T is quieter, noticeable quieter under acceleration and cruising. 2.0 has that classic honda engine sound, which could be tune to be a more enjoyable intake noise.
I have been doubting the 1.5T, but test drive, it feel very nice. Since it's honda's first turbo civic, I tend to think they did a lot of homework to make sure this one is a safe shot. 10th gen is their game changer, they shouldn't play lightly on their engine choice.
If u'r going for EX-T, just jump to Touring, (here in Canada, the price difference is 2k... and u get better sound, leather, more gadget and those LED head XD )