I haven't ridden a Casaroll, but I've looked at them and fondled them...

Workmanship-wise they look very similar quality. The geometry of the Casaroll looks like the sort that works well for me. (cyclo-crossy toury relaxedish)

I've only seen them as frames that the shop has bought and then built up to their own specs or to a customer's specs.

The ones I've seen for sale at my LBS have been a few hundred $$ more than the Surly Crosschecks. My shop carries many brands and makes of steel bike, so i have to be careful when I walk in there...