What is this 11.11 you guys are talking about??
Anyway, my it01 came a day before ZSN and I have been doing some comparison between the two (I know they are $99 and $23, so not apple to apple, but it's fun). From all my kz collection, the ZSN is the one that sounds close to it01. The bass on it01 is good and punchy but in some songs it can be a tiny bit too much while zsn has less impact, but I find it is perfect amount of bass. Into the mid, it01 is more forward and has a little bit more low mid that make vocal sound a little bit thicker ala shure (not as much as shure tho), while zsn has a thinner vocal, but it also add airiness to it. Treble is almost the same for both, maybe a tad more detail on it01 or less grainy.