Both use the Serrota fit cycle, and Paul Levine at Signature is supposed to be one of the best fitters in the country if you shcedule with him. Another fitter I've seen recommended is Mike Sherry of Performance Labs. Any reason why you want that particular frame vs one of the custom builds available from the shop thats doing the fitting? The cost of the fitting is included in the price of whatever you decide to have built for you by the local shop.