Absolutely there's a difference in charging time between 32 and 24, and 26 amps. It's all about those amps, but of course the Bolt won't draw more than 32, so any unit rated above that only increases safety and cost. I say safety because I'll betchya in some little no-name bootleg EVSE like that Amazon one, it's nothing but a cheap through hole PCB mount relay rated at exactly 32 or 24/26 amps. I'm extremely weary of something so tiny, operating at full power for 8 hours straight. You just dropped $40,000 on a car, spend the extra money on an ugly, indestructible bomber of a charger like a clipper creek - the kind that makes a loud CLUNK that you can feel when it turns on.
The CS-40 EVSE 32 Amp charging station works with all SAE-J1772 compliant electric and plug in vehicles.
store.clippercreek.com
They're a lot of money, but they're tanks. There are also other clipper creek chargers that aren't so beastly and in a giant metal box that cost less, and I've never heard a bad thing about them too.
I also advocate for plugging your stock charger in to 220V (it's a clipper creek inside, FYI) It's only 12 amps, but they're well designed. And yeah they have a PCB mount relay too, but they're only putting 12 amps through it. It's still way faster than 110V. See other forum posts for the adapter.
I realize it sounds like I'm shilling for Clipper Creek, but they're just solid machines. I personally plan on building my next EVSE, in the unlikely event that the last one I built fails.
Good luck.