It's funny you say that because I tried on the Fitz, Regent, and the Milano. The Fitz jacket seemed to be much wider in the waist and hip than the Regent, and the trousers are similar. The Regent fit me much better OTR. I bought this one and a Milano.
That being said, I am considering returning this Regent for a Gray Flannel BB Fitz that I saw at Nordstrom.