I have to vote for Grandpa Munster - My son pointed out to me that Monson is a well, a chubby, rounded sort of fellow and Count Chocula is more angular.
Frankly, I'd top it off with saying he just looks like death warmed over, especially with the ring of red around his eyes like Bob Hope had before he passed away. (Yeesh)
Another vote for Count Chocula. Grandpa Munster is round (as someone already mentioned) and kinda cute & cuddly in that halloweenish way. Monson is NOT cuddly in ANY way!! :O