2, 4, 6 deck differences in BS

I'm sure there's a somewhat significant difference with the 2 deck game against the 4 and 6, and I have my basic strategy firmly implanted for my multiple deck (Primarily 6 deck I guess...one of the reasons I'm here for my question) games. I was wondering if there's a big difference between a 4 and 6 deck game, as far as BS goes? Will I be off okay playing a 4 deck shoe with my "6-deck knowledge?" Probably...I just need re-assurance and would like to make sure. How 'bout 2 decks? If I am posting this message in the wrong area (Maybe I should have went to Beginner BJ) ...sorry! A reply to this will be greatly appreciated.

P.S. Will my basic strategy variations have to be changed for 4 deck? (From a 6-deck)...how 'bout 2?