One system? What game has one system? If I recall the I-Novae people said it was a galaxy or more.

The I-Novae Engine is capable of allowing you to explore billions of solar systems as well as other galaxies however Infinity: Battlescape will be restricted to a single solar system. This will allow us to focus our resources on ensuring that it provides the best experience possible. We may offer additional solar systems after the game ships.

Space Engine is about space mostly and what it does better than anything is rendering of stares, galaxies and such.

Infinity, for the recent years, is oriented towards land generation and features and therefore has more graphic-oriented shaders, such as - better shadows, better water textures, tweaked terrain, smoother transition between detail levels, ring landscape generation (not realistic one)

Otherwise the game has amount of details far lower then that of SE

And finally, the game has taken a completely different path compared to "space exploration" theme, as if it is trying to hop into another bandwagon than it was intended for in the first place. Which is very much disappointing.

Seamless interplanetary warfare across a procedurally generated, true to scale solar system

The I-Novae Engine is capable of allowing you to explore billions of solar systems as well as other galaxies however Infinity: Battlescape will be restricted to a single solar system.

I have not seen any galaxy generation from I-Novae so I can't really say whether it is better looking or not.

You are confusing quantity over quality. They have many varying features on single planets, SE may have trillions of worlds but you go to any desert world in SE and it will have much of the same layout as any other.

I am talking about their engine capabilities, not a limited prototype demo.