IMO the .35 Whelen wins in versatility over the .357 Max. I have never owned a .357 Max, but there isn't anything I'd use the Whelen on that I wouldn't use the Max on to hunt. However, you need to realize that the .357 Max is going to change drastically the ranges at which I'm comfortable taking game.
Continuing with the versatility theme lets talk rifles. .35 Whelen can be had in several different types of rifles like single shot, bolt, pump, lever, and semi auto. You don't have a whole lot of options in the .357 Max, basically just a single shot without throwing crazy money at a one in a kind rifle. If you want a .357 Max performance in a rifle without being as limited on rifle actions then get the .35 Remington.
So lastly you need to think of bullet options which has been touched on here a bit. Both rifles have the ability to use the same caliber bullets. However, the .357 Max can't be loaded up to .35 Whelen levels. The .35 Whelen can be loaded down to probably even .38 SPL levels using cast bullets and the proper powders, and can hit around 2700 fps with 225 grain bullets. The .357 Max just can't match this kind of performance period.
So unless your state hunting regulations requires you to be restricted to a straight wall cartridge of a certain length there is no real reason to pick the .357 Max over the Whelen. The .357 Max is a good cartridge for those who need it, the .35 Whelen is better for those who don't. I currently don't have any .35 Calbier rifles in my stable, but have owned .35 Rem, .358 Win, and .35 Whelen, I also have a couple of .357 Mag revolvers in the mix.