actually
(assuming you mean auto-shuffler and not CSM)
If you can use the standard 1-8 spread at both games, with the same conditions at both games (heads up) the double deck game is superior.
Usually the shoe game will wind up being much better because
1. You can wong out of negative counts
2. You will often get an uncrowded game (esp at $25 minimum)
3. Game speed at shoes if uncrowded is much higher.
4. Cover beting is required at DD game.
If the DD game lets you blast away with no cover, even a 50% game with S17 DAS rules will be far superior to the 4.5/6.0 S17 DAS shoe game. The auto-shufflers (two blue decks in play while two red decks get shuffled) make the double deck game worth even more because there is less downtime shuffling. Rounds per hour will be the deciding factor.
SCORE PER 100 ROUNDS (S17 das)
DD 50% PEN 1-8 SPREAD: SCORE $34.11
6Deck 5/6 Pen 1-8 Spread Playall: SCORE: $24.90
6Deck 4.5/6 Pen 1-8 Spread (Wongout at -1) SCORE 40.70