The reason SC seem so much farther behind is because they've dumped an enormous amount of work/resources into marketing, PR, and the micro detail of the game. Every little bit and bot "has" to do something. Theres like 20 moving parts per gun. And if you take a look at their website, having an idea of what web work costs, thats a no **** million dollar site. And I cringe when I think about how much of their fans money they put into things like TNGS, and wingmans hangar, then look at how they've outsourced 2/3rds of the game, its mind blowing. Not in a good way.
E

on the other hand has a much better grasp on what its doing. Their design philosophy went Fun>Gameplay>Looks/Immersion>Realism, and its shown. They didnt waste time with some crazy marketing campaign. Braben didnt take time out of his day to figure out how best to milk the player base for more money, they just worked on the game, and trusted that it would sell based on its own merit.
I seriously hope SC turns out as amazing as its been toted to be. I mean, its only being paraded as the up and coming PC flagship title. SC got me for the same reason Eliite did, they've got an amazing idea, and the capacity to make it happen (Its obviously got tons of people willing to spew money all over it, and no producer to demand they spew more).
TL;DR
Elite Dangerous is just more realized ATM, and spent more time working on the game, then working over their fan base. Your just seeing the results of where each put their time/effort.