Originally Posted by Greymalkin

If the payoff schedule is the same, then go for the bigger jackpot. Remember, though, that if the jackpot is $1200 or more it will require a W-2G to collect your winnings.

The number of machines or players in a link does not affect the probabilities on your machine. The only affect of other players on a linked progressive is to reduce the chances of you being first to hit the jackpot.