Mikes, I like to refer to that as the "Epic" factor, which Sup Com so well achieves do its support of larger maps. Basic gameplay remains the same, it's just like an elongated battle of StarCraft on a bigger map.
Again, i have to disagree.
Starcraft constantly forces you into Micro, more to the point, a large part of gameplay revolves around it and manually triggered abilities of individual units are critical to winning a skirmish. In Supcom on the other hand, while Micro is still present to some extent, you can never afford to spend much - if any - time on it, nor would it be wise to do so, as you usually have several larger issues/battles to attend to simultaneously - If you start Microing too much you may gain an advantage in one area, but lose in several others, quickly lose map control as a result (map control in SupCom = resource control), or fall behind in other areas. SupCom's scope means that you actually have to decide which areas of the map are important to you and where you want to concentrate your forces, or how thin to spread them and where you can risk an airlift without being intercepted by fighter patrols and where not, which parts of the map are worth considering for static defenses and where you need reserve forces in case of a breakthrough or air-lift based attack (if your air control is suppressed enough in that specific area).....
I guess it's kinda hard to explain if you haven't gotten into it yourself too much... but maybe consider this metaphor: Starcraft is kinda like playing with a ball that you can do all kinds of elaborate and difficult things with, like throw it into a basket with precision. In Supcom... you have 10 balls, you don't have to do anything elaborate with a specific ball... you just have to keep them in the air somehow, all of them, at once.
Yes that analogy is lacking on several levels so don't please scrutinize it too closely, but maybe it still serves to demonstrate a basic difference.
The focus of each game is entirely different and (meta-)gameplay changes radically as a result. Most of what Starcraft gameplay is all about is all but irrelevant in SupCom and vice versa.
The only way you could change that fact, would be to heavily mod one game to be more like the other, lol
... Except that it wouldn't work. You couldn't have a game that has the strategic depth of SupCom and the importance of Micro of Starcraft at the same time without turning gameplay into a muddlet distorted mess... there is only so much information that one can process at a given time and there are only so many actions one can take at the same time and that is why the focus of each game is actually quite important... it is what makes either game playable.... and it also is what makes each game really radically different.