No... Universe Sandbox improved a lot of things, the Dev's fixed the gravity simulation to be more clean and realistic , they made it possible to make procedural planets, rings, ect., galaxy simulations are a lot less laggy, and the way the simulation works and the new engines behaviours is a lot more clean and "alive". You sort of have to think in a lot of ways to see the major improvements. Its not like Minecraft, or Space Engine that like every month or so, they add new blocks, bodies and more. And that's the thing that to me is the best of Universe Sandbox, that it gives you playful, fun features but as well try to make the game as seamless and clean as it could be without drowning you in crashes, bugs and glitches.