In my experience, styling and cut in are the most important things here.

I've had units ordered with a variety of hairlines, but I got them all to look the same with my styling and cuts. I've never had a problem getting the style I wanted, no matter what the ventilation...

Don't worry too much about the specs, apart from colour. But SFS front looks most natural and is easiest to get it to do what you want. #64 is also easy...