I don't think the PS2 wins RPGs. Especially from my perspective, if we take region locking into account. A lot of great PS2 RPGs didn't make it to Europe, in fact it took until 2007 for the PS2 to overtake the Gamecube in RPG terms. But either way I think the DS offers a better RPG selection. The remakes and ports help.
Speaking of the DS, I think the 3DS wins for sheer good games/time available ratio. Best first year ever, I don't think anyone will dispute.
The DS name is clearly a godsend.
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^Poorly disguised anti-caps sig