Ring pushups

Is there a thread already dealing with these? If not, how good are they compared to pseudo-planche pushups,or to declined pushups with pushup bars?

you can do pseudo planche and deep push ups on rings, both of which will be very beneficial.

I like them because they teach how to stabilize the rings. Even though some of my guys can hold a ring support, MU, or ring dip- they still find ring pushups trying even if they can do fine on PB dips.

PPU's are much harder for me though than standard ring pushups, even typically bulgarian ring pushups. However, Ring PPPU's are really tough.