I have a Stage 1 Stiletto and a 2205... no comparison for me really. The Stiletto is better in every way - more versatile, better sounding, better build quality, better looking!! :lol: The 2205 does its one thing really well, but that's about it, and 9 times out of 10 I choose to use the Stiletto in my work. With both in the room, the 2205 just sits there most of the time...
One thing I will say though - I don't really see the Stiletto as a Marshall replacement amp - it really sounds nothing like a Marshall to me - the Stiletto sounds like a really cool Mesa. If you're looking for an authentic Marshall tone, get a Marshall or one of the many clones out there. The Stiletto is really it's own thing IMO...
Hope this helps.