I'm not sure what you mean. More advanced how? Gameplay-wise? Technically/Visually? Story-telling?
Gameplay-wise they've both made advancements but WRPGs have done a better job of adding more variety of play-styles with different perspectives that cross genres.
Technically Western games this gen in general appear to be technically more advanced than the majority of games from the East regardless of genre. However, in the RPG genre, whilst this is mostly true, Final Fantasy XIII is fairly impressive with very long view distances. Also, most new JRPGs are on the DS so it's probably a bad comparison to make. It seems to me Japanese devs have a tough time with UE3.
Story-telling they've always been different in how they do things. I personally prefer the way they tell the story in WRPGs allowing you to fill in the details of the story around you and giving the illusion of making important choices. To some that may be advanced but a lot of people prefer having the story narrated to them.
Also, WRPGs are shorter than JRPGs? Since when? I think you need to play Baldurs Gate II or Dragon Age... or an Elder Scrolls game that never ends. And why do they cost more?








