Everything that Rich indicated is spot on, with adding is that the heavier grinds do make a difference on very coarse hair simply because of weight. Also the angle of attack will be different across the grinds, as well as the way you hone them. A wedge is going to be honed a bit different, and to much success in a different medium. Although I use dilucot with a trans ark finish on most of my razors, for a heavy grind I use my Shaptons. The only other thing is that a FBH (Full bellied hollow) is the most finicky in regard to safety, lateral movement and Angle of Attack, the hardest
To hone, and can give you a REAL BAD day. As everyone has mentioned you will find favorites and with time and skill you will find your sweet spot, try them all, don’t get shoehorned into 5/8, 6/8, 7/8, 8/8. Also try razors that have been gone on different mediums, as your face will also tell you which one of those best fits your face
As a professional I shave tons of types of beards, hence having multiple straight to use in the shop. The grind Does make a difference. For instance I have a gentleman who’s beard is so coarse that a full or quarter hollow in 5/8, 6/8, and sharp enough to slice space/time, bounces right off his whiskers, Yet when I take a Full Wedge 8/8 that I cannot shave myself with, slice like butter and give a DSBBS shave
So “long story long”. ALL factors of a straight are factors, you need to find the combo that works for you.