you can compare here: http://products.amd.com/en-us/NotebookCPUResult.aspx
The main difference is the wattage use of the Turion, which is slightly less than the Athlon one (31 to 35). The core speed of the Athlon is 100Mhz higher. That's it then.
Because of the highter core speed and the higher wattage use it's possible the Athlon is faster.
Interestingly there seems to be no difference between a QL-64 and 65. Strange!