Rising is entirely better. Short, but if you want a long 20+ hour campaign, Ken's Rage 2 has that, although the combat and a.i. might be too shallow for most action fans. but personally, I'd wait for NG3 Razor's Edge which will be $40 new and entirely improved and tons of content and more unique playable characters, and some of the best enemy a.i.
From: Trixone | 2/23/2013 1:47:26 PM MGR is like a delicacy, it's really tasty but you'll devour it in one bite. DMC is like a cheap greasy pizza, it doesn't taste that great but it will fill you up more.
I love both but Raiden and the stylistic approach to gameplay put MGR ahead for me