I've only ever tried the fairisle, but I would think it's slimmer than the turtle neck. I would think the fit is comparable to slightly larger. I've never even handled a Gitman Vintage, but I've eyed the size charts. I would think you'd be at most a 48, maybe even a 46. I would think 48 but that it'd be roomier than your Gitman Bros.
1/2/15 at 12:34pm