Sidious was so totally toying with Mace, at least at the end. I don't think that his saber skills were lacking much if at all. Mace found his shot & took it, and Sidious lost his saber. That's fine. Mace had the saber battle that day. But after that, with Anakin in the picture, Sidious didn't pull out all the tricks he could've. He bated Anakin into helping him. Look at how he glances over to him & back as he's laying it on SO THICK with the, "Please don't kill me. I'm too weak. Too weak." So obviously an act, especially when he pops up and finishes Mace off. Not so weak after all, eh?
I totally think Sidious/Yoda is a stalemate. I don't think either of them could defeat the other unless they suddenly got lucky. Where Sidious could've beaten Mace alone, he would need a distraction to defeat Yoda, and vice versa. Yoda failed because he couldn't beat Sidious, not because he was beaten. A draw doesn't earn a mark in the win column.
Hence, I cannot choose either option in this poll. 🙂