Previously, I have done lots of tests with the BF1 and the FO8 on the oval, and the FO8 is basically a brick wall aerodynamically compared to the BF1.
Given the same power and weight, the BF1 is still miles quicker because its so aerodynamically efficient, this means that it is closer aerodynamically to an IndyCar then the FO8 is.
The downside is that, even with full pressure R4s, no wing and no TC you still have to try hard to make it spin @ T3 - so the racing will be less interesting
I'm sure something might have changed in LFS by then that may influence our decision - but we've got a while yet