Something I find funny
SC:
No 6DOF
Tiny scale solar systems (< 1:100)
Tiny "Galaxy"
Magical Space Gravity
Vehicles seem to lack of space for fuel tanks
Realistic thruster outputs
ED:
6DOF
1:1 Scale solar systems
Entire galaxy
Have to spin/accelerate things to simulate the effects of gravity while in space
Can't be sure for certain, but appear to have space for something besides rooms.
Thruster output is dynamic and dependent on % of max speed
Compromising some on moment to moment gameplay for fun, = not at all simulation.
Compromising on everything else besides thruster outputs, = god tier sim.
Yes, let us forget that the engine provides 6DOF and the controls are the only limiting factor, controls which are still in development and they have said will change. Let's also forget that the entire reason systems are small is because of the in-fiction limit of 0.2C travel, meaning realistically sized systems would take ages to cross and be no fun.
Oh, I guess we should also not consider that SC has fewer systems because they're all handmade and not procedurally generated. Sure there's fewer, but each will have its own individual character and actually be interesting instead of just another point on a map. Guess quantity is better than quality though, huh?
Actually I don't even get what you mean by space gravity. You mean the artificial gravity in ships? ED doesn't even HAVE ship interiors, so how do you know if its ships have magical gravity or not? I'm pretty sure no one's ever complained about Star Wars, Star Trek, Battlestar Galactica, etc having artificial gravity either so why are we starting now? It may not be realistic, but at the same time it's typical of this sort of sci-fi.
Eh... I will admit some of the ships seem to suffer too much from "empty shell syndrome", perhaps most notable with the Freelancer and Constellation. Still, at least with how the Constellation is now I'm pretty sure some of those "benches" or whatever up near the cockpit are meant to hold computers and probably the life support too. Worst comes to worst you can say they're kept in the nacelles, but that would be an oddly vulnerable spot to keep life support.
(For disclosure, I didn't back ED but I do kind of wish I had. At this point I just plan to wait until it comes out and play it then, but I have nothing against it and do hope it turns out well!)