The delivery quotes should be transparent. If they aren't, either you asked for the quote wrong or there's a yellow flag on one or both quotes. A delivery skipper obviously cannot accept financial risk for much of the costs, but they can make assumptions to help budget. How realistic they are in doing so is an indicator of their experience and approach to doing business. What type of assumptions? Fuel costs, Panama Canal fees, agent fees, travel, etc.). It's 4500 nms and about 500 engine hours at 9 knots, plus generator time. 3500 gals diesel at an average of around $4.50/gal - call it $16k in fuel alone. Canal fees are probably in the $4k-$5k range. Oil changes and lay days, you're probably looking at $25k in hard expenses. And you haven't purchased insurance yet.
As an aside, the aforementioned Ray McCormack talked a lot about a lawsuit he launched against a customer. Best I could define from Rays rambling is he was supposed to deliver the boat to Canada but left it in Port Angeles WA instead. Ray also wanted additional fees for repairs he made and some other nonsense. Owner countersued claiming Ray damaged the boat and didn't fulfill his contract. Owner won. Mind you, this is from Ray - why he would post this is beyond me but he did. Musings of Ray aside, clearly there was a mismatch of expectations and responsibilities between delivery skipper and owner, either through misunderstanding or lack of transparency (sort of the same I suppose).
To normalize the two delivery quotes, you should try to figure out where the differences are. At an extreme, let's say both their fees are the same but the expense assumptions differ - one guy assumed diesel is $2/gal and the boat will burn 4 gph. That won't happen and there is no way a delivery skipper can absorb this risk (not should they).
As a past delivery skipper who did a lot of shorthanded deliveries (myself plus one strong crew for most from SoCal to PNW), a delivery of this duration really needs a total of 3 crew plus captain. It could be done safely with total of 3, but in my opinion, having the 4th person on board allows more time for other work including cooking and keeping the boat clean. Refueling the boat will take a couple hours in a sweltering location.
Final thought is shipping rates went berserk during Covid and never returned to earth. Pre Covid I had a quote of $16k to Florida from Ensenada for Weebles. 6 months ago I received a quote of $25k from Costa Rica to Florida, less than half the distance.
I guess there are some creative options like hop-scotching the boat and leaving it in marinas for a while so you can cruise locally say Bahamas for a couple months, then have it delivered to Panama and cruise Bocas del Toros and transit the Canal before having it delivered to southern Mexico and cruise for a few months. You get the idea. It would take a couple years but there are some amazing cruising grounds that you may never see otherwise.
Unfortunately, there are not many power cats outside of Florida. So idea of buying one in California is a bit of a unicorn hunt. Maybe the sticker shock will wear off and $65k shipping becomes digestible.
Nice boat. Sometimes the heart wants what the heart wants.
Peter