I would dare to say no, if you already know Dvorak then switching to Colemak doesn't offer a lot of advantage. There are some reports that say that Colemak is

I would dare to say no, if you already know Dvorak then switching to Colemak doesn't offer a lot of advantage. There are some reports that say that Colemak is marginally better but IMHO they where not conclusive. Bottom line, both are well designed layouts (Dvorak by a human and Colemak by a computer) and substantially better than QWERTY.