Whats better, a Turion 64 X2 or a Athlon 64 X2?

I want to know because i have both of these, and my Turion 64 runs pretty hot, so if anyone can help me out here, it would be appreciated.
they are both 1.9GHz dual cores, both 64 bit capable.

What i want to know is, does the Athlon run cooler, and is there anything that puts it above the Turion?