Some differences... Cosby committed rape, repeatedly
Trump is accused of seeing women naked in a pageant, or of touching someone inappropriately, or saying something vulgar
Cosby was accused, and there was no political motive.
Trump is accused, with the leadership of the nation on the line, 30 days before the election.
Cosby's accusers were supported by family and friends.
SOME of Trump's accusers already have family and friends coming out and saying their accusations are a load of crud. While another was shown to have strong ties to Clinton's campaign.
In any case, none of these accusers (to my knowledge at this time) have accused Trump of rape... just being rather vulgar is not the same thing, is it?