Unlike Xbox Live Arcade games, full titles purchasable under the Games on Demand brand contain a full 1000 points of possible gamerscore; Arcade games have only 200.
Capcom will be releasing the Revival Selection titles under Games on Demand, so 1000 possible points will be awarded rather than a measly 200. This situation is due to the games being released at retail in Japan.
Good news here. Not everyone enjoys digital ranking systems showing their gaming accomplishments, but being awarded up to 1000 points per game is a nice bonus to already great games. Hopefully saving the dog at the start of Resident Evil 4 will be one of those achievements. You mean people did that out of sympathy? Yeah right.
[Source]