hex no. graphics don't make a game Leaf Green and Fire Red were good, but the gameplay of the older ones pwned.
Sex yeah. The battling in LG/FR are better than Red/Blue because of the Elite 4 (2nd time) and then the people in the Sevii Islands. But yeah, it's not as good. It's just better in some ways.
Ruby.Sapphire though. They own all. Graphics, lottery, new Elite 4, new pokemon, new places, contests, the natures, trick house (hehe, that place is cool), secret bases. I could go on and on, but I wanna train again...