Gel Coat

Hello I'm new here I've searched didn't find any answers to my questions
I have old Hobie 14 I've done some repair on ready to gel coat it
I see a wide range of pricing on gel coat from 50-130$ gal are you buying a brand name or is one that much better ? is all gel marine grade ? what am I missing ?
definitely don't want to skimp on quality but don't want to spend extra for the same thing

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H14
H16
H18
H18
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I use FGCI gelcoat (fiberglass coating inc)
they make lots of versions, interior, exterior, brushable
the cost is around $30 quart (depending on what kind)

you can get with or without wax additive (used for final coats so it cures to a finish that doesn't clog up your sandpaper)

I can't speak for other brands but i would go with a name brand or one you know is good

How big is your repair? a gal is a LOT of product
I'm going to re-gel the whole boat, so many spots patching isn't and option IMO.
I don't know brands what is good what to avoid, it's my first gel coat job.
I've done fiberglass repair and topped it with Imron .
Just don't want to paint Hobie that may get beached or sit in the water .
was looking at fiberglass supply depot their prices are less than the others ?
Is the quality of product less ?

This is the first boat I sailed 35+years ago.
Otherwise I wouldn't have put the time and money in it so far.

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H14
H16
H18
H18
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adventurous!