I got it! Here are a couple of photos of the Winchester, including some comparison photos with a Case and a Rough Rider.
Check out those swedges!
The blade mechanics on the Case and Winchester are very good. The Case has good walk and talk but the Winchester has a bit more snap to it. The RR is a bit sluggish and the spey blade rubs. I've had other RR patterns (whittlers, stockman, congress) with excellent blade mechanics so I don't think this is representative of the brand but it does seem to be representative of the RR Sowbelly since I've handled five and all of them were the same. I mainly use the clip and sheepfoot blades though.
The Case and the RR were sharp out of the box. The edge on the Winchester wasn't sharp but the grind was even and I expect that the carbon steel will take a nice edge with a little work. The grind on the RR was uneven but sharp.
There are a few small gaps in the liners of the Winchester and the RR. The Case doesn't have any visible gaps despite how it may appear in the scan. I can't see any light through the liners in the Case. There's also a gap between the bone and the liner on one end of the RR. RR handles are glued as well as pinned but I had a similar gap lead to a loose and eventually broken handle on another RR (dogleg whittler). I'm gifting the knife but if I kept it, I'd probably try to fill in the gap.
The main blade on the Case is a little longer than the others but the knife is also a little longer so that's not surprising. The blade geometry is also slightly different. Also you can see that the sheepfoot is a little higher on the Case (as has been previously mentioned). The main blade on the Winchester slightly more comfortable to use because the sheepfoot sits lower.
But when the sheepfoot is open, the main blade on the Winchester sticks out a little more than the main blade on the Case. And I find the sheepfoot on the Case slightly more comfortable to use for this reason.
The spey blade on the Case is a little longer but the Winchester is bit more full.
Overall, I'm really happy with Winchester and I ordered a Schatt & Morgan 18 Sowbelly to go with it. I hope my 18 Sowbelly will look as good as the one posted by Peter.