In my area KoW has hard time catching on. I like some things about it, but it is far from perfect. I dislike the fact that every army is pretty much "all in one", lacking real character ATM.
Knowing Serbian population, I am quite certain that the system played at ETC would get the most support. Simple thing, the ETC Team (myself included) and people around it are the most motivated to organize events, and they organize the thing that they need for ETC.
At this point the 9th Age seems like more likely system to prevail, but KoW does have a chance.
What do you mean exactly by "all in one", that armies feel the same ?
Having played games with and against the Ratkins (skavens), twilight kin (dark elves) Empire of dust and undead (Tomb kings) armies, I can tell you that they surely don't fell the same when you play.
Sure, the differences might not be as extreme as they where in Warhammer, but they are there.
The undead and empire of dust armies, like their warhammer counterpart, have many units unable to march and make a large use of magical boost to their movement, and they get some autohealing ability with the life leech rule, plus some units that regenerate and good access to the heal spell
The orcs are an almost all melee army that fight and feel strongly like Warhammer Warriors of Chaos army
Elfes of all types are there, and are elites that fight better and faster than other races (but being better fighters don't mean that they autokill anything that comes in melee)
Dwarves are slow, but tough and good fighters, and have some of the best war engines available.
Ogres or toughs and strong, but are few in number so any point of damage is felt.
All of that to say that no the different armies don't feel the same from my point of view.