Are Dell monitor mounts interchangeable?

[darkxshade]

I got a dell 2405 and just bought the E228WFP... the thing is that I want to use the 22" in portrait mode beside the 2405 in landscape mode. Problem is that the E228WFP doesn't have a swivel. Would I be able to put the 22" on the 2405 mount and vice versa? Has anyone tried that? Is there an alternative solution?

Thanks