I think Strategy Healthy Edge is higher in fat and lower in protein than the regular Strategy GX (in the white bag). I don't know about the sugar or overall energy content, if they are the same or different.
I get the impression that the regular Strategy GX is "richer" because you can feed it to all your horses- including broodmares and growing horses. I think Healthy Edge is being marketed more to owners of riding and pleasure horses. But I don't know exactly how the formulas differ.
I've fed both. I had coupons for Healthy Edge, so I fed that for a while, but now that I've used my coupons, and I have a mare who is still nursing her foal, I have gone to the regular Strategy GX. My mare does bounce off the walls, now that you mention it
, but I figured it was more to do with the fact it is winter, the ground is muddy, and I can't ride her as much as I would like. So I dunno if the Strategy GX makes them "hotter" than the Healthy Edge or not.