i think you mean G-sync and Freesync...
but as it stands right now...
http://www.amd.com/en-us/innovations/software-technologies/catalyst
screen recording, good OpenGL support (it looks like, i dont have an AMD card) and FreeSync with displayport.
http://www.geforce.com/geforce-experience
screen recording (and ghost recording, up to the last 20 minutes), G-sync, gamestream (nvidia shield needed)
G-sync = need a special monitor = more $
FreeSync (when its out) = any displayport monitor that supports it.
really depends what you want, honestly.
if anyone else has more information then i do on this (im sure everyone else knows more) then go ahead and add onto this !