There's a world of difference between out-striking Maia and choosing to stand with Silva. Silva is dangerous whether he's initiating or countering. He's also (in my opinion) one of the most dangerous fighters off of his back. He remains calm and collected, and is capable of landing punches, elbows and submissions.
I believe Sonnen is a better wrestler than Weidman, and I don't feel Weidman's as relentless as Sonnen. I believe Weidman may have a chance at beating Silva, but in my opinion it's a very small one, and would be by the same gameplan that GSP is routinely criticized for.