50/50s 100 players or 20?

What's more productive 100 player 50/50s or 20 ?

@hawk I personally always like to play 50/50s with more players. The more players the more chances you have to be above the cash line if you are having a so-so week. Would you rater have 50 chances to place or ten. It is simple math for me when it comes to cash games the larger the field as long as it is truly paying out at 50% the better.

Who's playing in the 50/50 and what is the entry difference? Multi-entry? I think it's tough to make a judgement call without knowing more about the contest.