whats better. raw 80 or grubbie 66/80?

Piston bikes has a grubbie 66/80 kit for sale for 149 and a raw 80 for 159. Any comments?

I have heard that the raw with the slant head seems to be a power house. I looked at the same two engines on their sight. The thing that is throwing me is the raw says bicycle chain. Maybe someone could help us out. Have not bought either yet.

I would look for a cheaper kit from another source.
They can be had for a lot less, and nearly all are the same or very close.
You need to look closely at the ancillary items that come with each kit, that is the only real difference.
Quality can vary wildly from kit to kit, even among kits from the same company.

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If it ain't broke, and you mess with it long enough, it will be.

My engine is the Grubee GT-4 66cc. I'm am very satisified. I think mine was $140 with shipping.