MSH which was a trash port.
Marvel Super Heroes is pretty good without the ram cart, it's true Capcom had some difficulty utilizing ram expansions properly early on causing issues in some games (but they eventually got it right). Other ports like Darkstalkers and Street Fighter Alpha were great (earlier games without a cart or later with). MSH is a pretty advanced 2D game though, characters on the arcade version have more animation than any other, in later games Capcom cut crouching and other animation frames from the arcade versions as well, not just the home ports, it was just too much with the tag on top. Saturn got plenty great 2D gems with or without the ram cart too, both by SNK and Capcom (and others), so even if they weren't quite arcade perfect they were the closest you could get from both major companies rather than having a Neo Geo and being restricted to expensive and SNK only games.
Saturn had less games than PS, that's a given, but still, attach rates back then were what, 10:1 at best or something along those lines, okay with the bonus of rentals in some territories, but either way Saturn had more great games than any kid could own at the time in all sorts of genres even without the Japanese library in mind so not having a ton more on top didn't really make that much difference in practice until the competition killed it off and it got few and eventually no more games whatsoever of course. We're showing it held its own while it lasted and deserved better/had more to offer.
It's completely pointless and agenda driven to compare arcade game ports like STCC to GT. You can just say Saturn (and every non PS system for generations while at it) lacked anything like GT and leave it at that, making a direct comparison to any specific arcade game, which still came before GT anyway, is just silly. STCC had decent replayability too, even if not to the level of Sega Rally 2 on Dreamcast and its 10 year Championship, after finishing the Arcade and Saturn modes I enjoyed things like the Endurance races which made damage and pit stops matter and unlocking extras and stuff. It was also hard which made it last a bit longer. But sure, it wasn't the best port either and quite rightfully bashed, though I think it's a good game underneath (things like extreme polygon warping, usually not so prominent on Saturn, stuck out like a sore thumb, but that's the norm on PlayStation where people didn't care about it as much, or about low framerates and glitchy 3D of games like Syphon Filter, heh, those technical issues were only a huge problem when discussing Saturn games for the era's publications and now for you when talking about Burning Rangers or whatever else).
Great games are great games, real gamers recognize them whether they sell or flop or are trendy or not, if we always fall back on what is most popular then of course PlayStation was that and we can just not discuss the merits of anything else ever. Nobody said it topped PlayStation, just celebrated Saturn for what it is. Great exclusives and fine multiplatform games while it still got those if the publisher/developer actually made an effort, no different to later generations' multiplatform games & far from shit vs gold or anything. Plenty great PS games weren't as popular as GT either but for gamers they still count as part of its great library, as do earlier arcade ports. Well, quite a few enjoyed totally unrealistic arcade racers like Wipeout even after GT came along anyway and still do. I enjoyed 2097 on Saturn and 3 on PlayStation after I got it after Saturn died too (never enjoyed GT).
As seen above (loads more examples where these came from), Saturn held its own while it lasted, some ports were lesser, a few better, all around it was on par like any future gen's rivals, again, hardly shit vs gold. Even if ports often were inferior (but not so bad like botched examples people go to as if that's the best Saturn could ever do and often games you don't care to play even in their best version, lol) it had the 2D game advantage (which yes, wasn't all the rage back then as Sony pushed 3D hard and publications followed suit) and its own brilliantly shining exclusive gems. Its bad rep due to a couple games like Virtua Fighter and Daytona USA shouldn't have followed it through all its life when SEGA was quick to prove it can do a lot more (and much like VF3tb on Dreamcast VF wasn't even such a bad port, the original game itself was an outdated by then crude pioneer).