Well both are great. I prefer so much more western music than the japanese
But in the end, its all biaised and your opinion is only influenced by what you play. You play more jrpgs, you will like more jrpg music. You play more wrpgs, you willl like more the wrpg music. The brain is subjective like that. Most people wont make any effort to use their common sense and put their gaming preferences aside just to analyze the music.
I play more wrpgs than jrpgs, my system of choice for gaming is a gaming pc, theres a tons of awesome wrpg on it. I wont lie I prefer wrpg, I find them superioir in every way. I cant stand jrpg anymore. But opinions aside, i guess its all the same music-wise.