High Comp piston...What gas?

I am planning on replacing my piston. My choices are the wiseco 13.5-1 standard or the high comp 14.1-1. What are some thoughts on running 94 octane pump gas with 14.1-1 piston. Bike is 07 kx250f.

search wiseco in this forum.. you'll read that they rattle a lot. I want to say taht 14.5:1 is when you have to run race fuel/avgas, but I could be wrong. I'm a stocker.

I stopped using wiseco in my stuff because they seem to rattle a lot and not last as long. I always go OEM when I can.

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