Is it better than Rimworld?
A lot will depend on how much you're willing to tolerate a game that looks like it was made with zero budget and has a control scheme that feels like you're controlling an airliner (ASCII version), or have generic, non-animated pixel art that somehow makes the game look messier than how it looked originally, with a mouse control set-up that was obviously rushed to market (Steam version).
If you can tolerate its short-comings, I'd argue that Dwarf Fortress offers the richer experience in terms of procedural and emergent story-telling, as the game procedurally generates the world down to individual cultures and factions that have annual traditions and conquer territory, and digging through the world's history genuinely makes you feel like an ancient historian for a fantasy universe as you piece the events together in your head. However, if you don't give two shits about that and just want to enjoy a fantasy colony simulator, Dwarf Fortress has a learning curve so steep, it's practically an overhang, primarily due to how the game tells you nothing yet expects you to know everything from hours of reading online tutorials and Wikis.
The Steam version is more accessible to newbies due to its mouse-based control, but is missing a considerable amount of features compared to the ASCII version, and the mouse control and general layout leaves much to be desired for long-time veterans. The ASCII version is more feature complete (Adventure mode is so much fun!), and costs you nothing, but is driven exclusively with the keyboard with controls straight out of a roguelike from the 80's, which can be very,
very intimidating to anyone who hasn't played those kind of games.
Overall, I'd say give it a shot. It's a game I've sunk hundreds of hours into, yet I still feel like I have much to learn. The ASCII version is free if you're worried about wasting your money, and that's the version I prefer, but I can totally understand if a new player might find the Steam version more appealing from a control and aesthetics stand-point.