Trick Flow small block heads

I have not had a chance to talk to Trick flow yet, but it looks like they changed the recommended head gaskets. It was the Cometic's before, but now looks like the say to go with the Fel-Pro 1008. I have the Cometic's on mine, and am not pulling then out, but kind of wondering why the change? Below is from their instruction sheet I found online.

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When I put my trickflow heads on last year I used the felpro 1008 head gasket. So far I haven't had any problems with them. I am right at 11.1 compression