I just received a Caruso from eHaberdasher, and have one of their older Benjamins (the slimmer model, Lucente I believe). They key comparisons I've noticed:
- Caruso is 3/2.5, Benjamin is 2B
- Both are basted for working buttonholes, and come without buttons attached
- Benjamin is slimmer cut. Slimmer lapels as well.
- Benjamin has higher button stance, which is somewhat odd for a two button. I understand the new models have a lower button stance though.
- Surprisingly nice lapel roll on the Benjamin. The Caruso as well, but this is expected.
- Construction on the Benjamin actually compares pretty favorably--the Caruso is definitely nicer, but it's not as much of a difference as the price difference would lead you to expect. I've only had it for about 6 months (and the Caruso for only a week, and haven't even worn it yet) so I'm no authority on this, but the fit and finish on the Benjamin is nice for its price.
- Nicer buttons on the Benjamin. Why Caruso would put crappy plastic buttons on a $2000 suit is beyond me. Easy fix though...
Anything specific you're looking for? I've posted pics of both suits before, the Caruso today actually--look through my older posts (note that the Caruso has had no tailoring done, while the Benjamin is post-tailor).