Contexts vs Witch

I'm evaluating a couple of Mac task-switcher tools: Witch by ManyTricks and Contexts. I think I'm going to go with Contexts for the following reasons:

Advantages of Witch:

• Can switch to a specific tab in Chrome and some other apps

Advantages of Contexts:

• Faster than Witch. Sometimes Witch takes a few seconds to open for some reason.
• Reliably binds to Command+Tab. When Witch is bound to Command+Tab, sometimes the old switcher opens on Command+Tab, for example, when the Google login screen is being shown. Contexts doesn't have this problem.