Ordered a Super ED a few days ago, and once I get it, I'll add a DSP chip to it.

I've got a US Pilotwings cart that I'm thinking of using as DSP chip donor. My SNES however, is a PAL one, so I thought it might be a good idea to see if anyone happen to know if there are problems to be expected from doing that, just so I don't butcher that cart for nothing. Basically, what I'm wondering is if the DSP chips are identical between NTSC and PAL releases of the same game or not?

Also, I've read that you need a clock oscillator. Can I take the one from my US Pilotwings cart and use in my PAL SNES, or is the DSP clocked higher in US carts?