Like what? I know there is a difference in how group chats are handled, but thats a compatibility issue, not a rich chat feature. The only thing I can think of is Apples stupid push for more emojis and even worse Memojis. Otherwise, pics, gifs, emojis work between Apple and Android. Seems like its the green v blue and group chat edits that are the differences.
I can send them fine on Verizon SMS, from Android to Apple. Apple decided that sending via SMS, regardless of carrier limit, they get wrecked. When I send the same video back to Android from my iPhone, the video is shit.
I've tested this repeatedly across carriers. Since Verizon doesn't seem to have an MMS size limit, it makes it pretty clear what's going on.