That looks cool and I am actually keeping an eye on it - but there's no way to compare a game that's not out to one that we've had 4 years to play and find problems.
I've played Eugen games before. They're good, but I would not consider them a better develop than relic, and I also would not say their games offer the same experience (we will see what Steel Legion is like when it comes out).
you are right, we can't compare a 4 years old game and one not even released but what brings most of the people to coh2 is MAINLY the WWII CASUAL RTS aspect.
The cover mechanic, supression, and other game mechanics from coh2 are 'optional'.
And Steel division is supposed to be half WARGAME (tactical RTS) and half RUSE (casual RTS), making the perfect sweet spot. Just like coh2.
Add to this that this game will be release in July 2017, made by EUGEN company (known for it's perfect balance design and game support) and a MASSIVE 10 v 10 team games ! (People always choose a game for its team battles first, then they switch sometimes to 1v1 but it's always team battles which matters at first).
With all these points, i see no reason why someone would still play coh2 by july 2017 but that's only a personal opinion.
To add a bit more credibility to its, i have been part in the Steel division alpha and sadly am not allowed to release any kind of content for now but i can tell you that it's at least as good as coh2 with much less bugs, better balance.
edit : you can see some gameplay here
https://www.youtube.com/watch?v=yerdh3TfZds . looks complicated on the video but it's in fact very easy to master when in game.