Factory Double Taps run at 750 ft/lbs of energy, way more than any 357mag.
Although that is true for most common .357, they can be loaded quite hot as well. Check out Buffalo Bore's hot load:
Heavy 357 Magnum Pistol and Handgun Ammo
Heavy 357 Magnum Ammo - 180 gr. Hard Cast LFN-GC (1,400fps/M.E. 783
ft. lbs.) - 20 Round Box
Since when is the 10mm this all powerful bear stopping round? Even loaded to it's potential it doesn't exceed what the 357 magnum is capable of and most factory loads are nothing more than a warmed over 40 S&W. Anyone who thinks this is a grizzly stopper is delusional.
I think that when most people are considering the .357 or 10mm for their woods guns, it is not where they are likely to encounter grizzlies, but more where there are smaller black bears and mountain lions.