My guess is the number of Bene's and Jeanneau's in charter fleets has more to do with Beneteau making a business decision to pursue that market.
Same reason automakers pursue the auto rental market. The trade-off is low margins against a marketing advantage. You could argue that those charter fleets provide a greater marketing advantage than all the print ads in all the sailing magazines.
It's also in-line with Catalina's business model to NOT pursue that market. Catalina now advertises in magazines, but remember for years they didn't even do that. They're conservative with their designs, updating existing models over years, even decades.
Beneteau updates their models frequently, which gets them more press, but you could argue it's a strategy that has a negative effect on the value of their used boats.
Neither is right or wrong, just two different approaches to a really tough business.
95 Catalina 30 Island Time
“If a man is to be obsessed by something, I suppose a boat is as good as anything, perhaps a bit better than most" - E.B. White