Really, I think it all comes down to budget, time, and the executives in charge of the projects
Less budget and time leads to shortcuts like less detailed models and simpler design overall
Disney execs were not very hands-on but they demanded certain things, like presumably a more kid-friendly artstyle that translated easily to merchandising
George, on the other hand, was EXTREMELY hands-on, often commenting on animation and editing scripts, but made most of his decisions at a very high level, which left Filoni and his team a lot of leeway about the specifics. Plus he didn't want to just shit a show out to sell toys, he genuinely appreciated the art of it all and wanted the final product to be of a peerless quality.