Since I own a Winchester in 375 and am expecting a Zastava in 3006 which, hunting gods willing, will one day be stablemates with a 375 I'd say either of those two. I recently was in the Texas Hill Country and visited with gunsmith Tip Burns who was working on a few of the Zastavas and a couple of Whitworths. They are the same and they are commercial FNs as he was quick to point out. What's not to like? They fed beautifully and have a satisfying Mauser feel. Then again, a well tuned Winchester is no slouch.
I'd say get the one which feels best. Between the two the Whitworth Express rifle in 375 feels the most 375-ish to me in the hand. In fact, that stock feels so good I'd have no problem putting a 25 or 26" barrel on it providing it was scaled to match the proportions of the stock though I'd probably keep them both at 24".
