Our local sporting goods store used to carry Winchester Vanguard spotting scopes. I did a side-by side comparison with it and similar scopes from Leopold (Sequoia 15 - 45 x 60), Bushnell (Legend 20 - 60 x 60), Burris (Landmark 14-45 x 60), Sightron (SII 20 - 60 x 63) and Nikon (Prostaff 16 - 48 x 65). One evening last summer I set them all up in the loading dock at the store (I know the manager of the optics dept) and looked at some targets I had with .22, .243, and .308 holes and a USAF 1951 Test Chart set up at just under 200 yards at the edge of their property.
I wasn't impressed with the Winchester at all. I suppose it depends on what you want / need it for, but to my eyes it didn't measure up against the others in brightness, clarity, or contrast. It was clearly the worst of the group, but the least expensive ($100) so if price is your primary motivator, maybe it would do...
In 5th place was the Sightron - I was surprised at how poor the scopes clarity was, especially for the price (around $600 if I remember right). It had a fat, fuzzy, purple fringe around everything. It was so bad I thought for sure it was a bad scope (display model after all...) so I had them bring out an unopened scope, and it was just as bad.
4th place was the Burris - nothing special about it at all, or it's big brother (20 - 60 x 80). Tempting for the price (about $150, or $200 for the big brother), until you looked through them and compared them to the others.
I thought it was a close thing between the top 3, but to me it went like this.
In 3rd place the Bushnell was OK, but just didn't have the brightness or crispness the Leopold and Nikon had. For the price (about $250), it looked like a good deal though.
Even tougher call between the Nikon and Leopold, but to my eye the Nikon had slightly better optics. It was a little more expensive though ($400 vs $300), but ultimately it is what I went with.
BTW, I also looked at a Burris XTS 2575, a much different type of scope than the others - I think it is called a Cassegrain-style - with a 75mm objective. It hung in there with the top 3 until the light started to fade, and then went down fast. Really, not too bad for a $200, compact scope.
Just a Shooter