Oyster White is very very close to a 93's (slightly oxadized) gelcoat. It was close enough that you couldn't see any lines or contrast where I did the entire cockpit and blended into the rough gelcoat of the hullside/gunwhale.
Getting the custom tint that Dale spoke of might be the ticket if you want to be perfect? Not sure of its durability.
Perfection or its equivalent (Awlgrip) are tough as nails. As it pertains to scrapes and abrasion it is much tougher in my experience than gelcoat. The "polymeric" nonskid that they sell to go with it is expensive but unbelievably easy on the feet but much, much, better traction than the original NON-SKID!
If you have a very large repair area, you might better plan on painting the entire topside ($$$). If u have a cabin, blending it against SMOOTH gelcoat is probably going to give you a tape line and a noticable contrast in SHINE?
That contrast might not be so bad if you intentionally went with a slightly darker color and made it look INTENTIONAL! I think Dales boat and a few others looks pretty sharp with that option!
Matching and spraying gelcoat is bitch but should be easier for a pro to blend into smaller repair area's. Are you doing it yourself or paying a pro?