Pal60 sometimes is supported by TVs, but not always, you can try it and if the image shows up all fux0red (or doesn't show up at all), you know your TV won't support it.
Pal60/NTSC have a better refresh rate, but a lower definition than Pal50. That's why on the Snes, European games would run slower and have the dark frames at the top and bottom.