Less clunky than Unity. Devs actually care about the engine. Many quality of life things already built-in. Open-source (don't like something? Just fork it on Github and make your own version).

But also. Less mature. Less groundbreaking tech. 3D is still kinda eh.

For me personally, *this* is the one I'll pour my hours into now.
It's good.

EDIT:
4.0 is a massive update to the engine, brings rewrites and fixes across the board (they even fixed Steam hour tracking). 3D is usable and getting pretty. 2D performance is slower on this version on the Forward+ rendering engine, at least until it's fixed.
Still amazing, still using it.

Less clunky than Unity. Devs actually care about the engine. Many quality of life things already built-in. Open-source (don't like something? Just fork it on Github and make your own version). But also. Less mature. Less groundbreaking tech. 3D is still kinda [i]eh[/i]. For me personally, [b]*this*[/b] is the one I'll pour my hours into now. It's good. EDIT: 4.0 is a massive update to the engine, brings rewrites and fixes across the board (they even fixed Steam hour tracking). 3D is usable and getting pretty. 2D performance is slower on this version on the Forward+ rendering engine, at least until it's fixed. Still amazing, still using it.