They're lovely in person as well. You're quite right, it's a slightly shorter and trimmer fit. I purchased one several months back and it's been a great addition to the WFH clothing line up. It's remarkable value all round.
FWIW, note that the Winston & Co. cardigans seem to be a bit lighter-weight than the ones that other retailers have from Scott & Charters. For instance, the Colhay's shawl collar cardigan is advertised as a 6-ply, whereas the Winston version is advertised as 4-ply. (I don't know for sure that the Colhay's version is from Scott & Charters, but it sure looks to be.)
Now this change might well make sense for you, especially with the trimmer cut of Winston's version. I have a Scott & Charters cardigan (from NMWA), and the combination of its long/relaxed fit and its thickness make me treat it more like outerwear than a sweater. So if you're after something that's more like a sweater, you might be better off with less thickness and a shorter/trimmer cut. But this change may also help to explain the pricing differences.