Yep.
One step further - it's impossible to answer "who makes (insert automaker) coils?". Said contracts are always rotating as logistics and pricing change. You could buy two coils in Motorcraft boxes, and get a Standard in one and a Denso in another.
Aftermarkets also contract their stuff out. I've gotten SKF bearings in National boxes, National bearings in Timken boxes, etc...
Really, with a few exceptions, no matter what brand you are buying, you are getting one of only a few possible parts. The only thing different you are getting between brands is the box, the price, and sometimes the warranty.