Surfriding Boysen reeds help?

Im about to change my reeds on my xscream engine but i Saw they had 2 different model one for stock limeted and one for hi-performance, what is the difference between Them? And what would match my setup Best? I know the hi perfomance is the most obviously. But what is the differnece?


Wb1 rockered 900ss xscream
 
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