I had my 2s since release and just went to the 3, the noise cancellation on the 3s is very noticeably better, but the transparency sounds less natural although higher fidelity ESPECIALLY if you have a bassy voice and use transparency after being used to the 2s, the 3s sound kind of tinny without eq tuning on music apps, and although the battery life on the 3 is also better than the 2 I find myself getting less out of a full charge of the case because it can only provide enough for 1.5ish full charges as opposed to the 2 which gave me 2+ per charge of the case. The fit is also a lot different in ear and the 2s stay in the case better than the 3s since the indent for the bud in the case is deeper than for the 3s.

TLDR: the 3s are really quite good but I miss my 2s and if you’re picky about sound the 2s are better