The title says it all ^^, I think Ryuga a better blader, well that's my opinion.
L-drago and Pegasis
Ryuga
Ryuga controlled by L-Drago
Ryuga with Meteo L-Drago
Ryuga with L-Drago Destroy
gingka is a bright, strong and confident blader and very powerful and has beaten ryuga in the past and other strong bladers e.g Kyoya.
ryuga is a strong competitor has defeated lots of strong bladers including gingka, and he is a very strong and powerful blader.
so they are both the same ( maybe )