I would vote for the .357 in a revolver. The vast array of light .38 to heavy magnum loads available everywhere is a huge benefit. Most 10mm loads are just .40 S&W powered, which is OK, but not great for larger animals. The 10mm loaded to true 10mm power is hard to get offline and is expensive. Also, reloading the .38/357 is stupid easy and dirt cheap. I started doing it as a young teen. If you had an array of belt guns, I'd say go for it, but, IMHO, EVERYONE needs at least one good, packin' .357 Magnum.
I love the 10mm in an auto, but believe the .357 has the advantage in a wheel gun. That said, once you find the right load, the GP100/10mm combo should handle what you need done.
But for the grace of God, there, I go.