Most of the hype is from former users of the reddit version. I used sync for reddit for probably the past 7-8 years so it's super exciting to have that same user experience on lemmy. It's definitely a bit more refined and polished than other lemmy apps but it doesn't inherently provide any major features that other apps don't. I really enjoy it for lots of the small QOL features, personally.

i too tried it but.. didn't really liked it that much. i like liftoff way more even if it still can't sort comments of my profile by new.. but i hope this gets sorted out someday in the future.

I've used both. Liftoff isn't bad by any means, it's in my top 3, but claiming there isn't much difference is kind of ridiculous. Maybe liftoff has everything you want, which is fine, but they're absolutely different apps.