You think Weidman has a better jiu-jitsu game than Anderson Silva? Surely you're having a laugh
As far as wrestling goes, Anderson is most susceptable to a power double, which as you said Weidman doesn't have. I have no doubt Weidman can take Silva down, i doubt that he will be able to take him down. Anderson's striking is on another level, he won't be able to get in close and take him down too easily.