GTS rad. or OEM/Aftermarket Alltrac radiator

The GTS radiator seems to be around $120 cheaper and can be used my the ST185, but i can get a aftermarket for the alltrac from radiator.com or 935motorsports but they charge way more than the GTS's.

Should I be safe and get the one made for the ST185 or make a GTS's work?

I think the only difference is the auto gts has the trans cooler on the bottom. I am guessing the 5sp gts has no cooler? Not sure on that.