i dont know really ...
maybe heatsink color, DIMM slots color and quality of components ...
when you have a look at ECS mobo, do not have a good feeling, but now azrock is much better! (for example...)
sorry but i think ECS is ECS and can not join High end products
i dislike ECS mobos layout and Electronic components
when i see ECS mobo i think that is grade/class B or C product
i do not suggest my friends to buy ECS
too bad! sorry