I work in Pro Tools 11. The comping tool is pretty nice, and comping vocal takes is essential. I wasn't aware that Ableton lacks this.
Just a reminder, Pro Tools 10 is 32-bit. That means outdated plugins, and it can only access 4 GB of RAM. Also, it can't bounce offline.
Pro Tools 11 is much better, but it can't freeze tracks. Pro Tools 12 can freeze tracks, but it's a subscription model. Yuck.