CAII cut sheet is on a relatively thin paper. It's a decent product if you want medium contrast and need cut sheet. I've used a lot of Super C, which is a thicker paper available even in large roll sizes. I'm currently working with Fujiflex Supergloss, not really a paper at all, but coated on heavy polyester stock. Besides the distinction in sheen from any RC paper product (it does resemble Cibachrome), it has higher contrast and a richer color gamut than any of the other papers. But it's a much higher priced product available only on heavy wide rolls. From the tech sheets, it appears that Maxima is a very similar premium coating, but on regular relatively thick RC paper instead. But so far, I've been unable to get ahold of any Maxima to test for myself. There are still serious pandemic-related shortage issues, as well as, apparently, sales distribution restrictions on certain products.
A lot also has to do with which specific film you're printing. You're going to get a lot more density punch and color saturation printing CAii from Ektar originals, for example, than Portra films. Depends on what you're doing. My guess is that Fuji was limiting their cut sheet offering to a single affordable product line in three sheens that was about halfway been the milder contrast often desired by portrait photographers and the somewhat richer look generallyu preferred by commercial and landscape photographers. Sometimes I make proof prints on CAii before scaling them up in size on more expensive paper. But in terms of faithful repro of the widest range of hues, their premium papers are a distinct improvement over CAii cut sheet.