DX9 is more G1 and come in a variety of funky sizes for the sake of coming in a variety of funky sizes apparently. Their bot modes lack, imo, compared to IF. They're also less attractive (to me). Their alt modes may be a bit better, but I don't collect legends figures to display them in their "awesome" alt modes (I have MP's and my voyagers for that). IronFactory is Dreamweave/IDW based. Usually have a same-relative size to one another, but bigger and smaller bots (in the comics) are usually bigger than than the normal sized guys; likewise the smaller bots are smaller than the normal sized guys. Their bot modes excel. They are super playable and super attractive. Nice joints. Recommended!