FunkDoc1112
Heavily Armed

For me, Pusha sounds slightly deeper and more nasaly but even then, I've gone off that and wound up being wrong lmao.Over the years I became able to tell the difference between them. But when Lord Willing first came out, I'm not even gonna lie and act like I didn't get confused on which one of them fools was rapping.
Edit: It took a while, but I ended up figuring out Malice was the more introspective one and then it became easier to distinguish between them
it's just crazy listening to an act where both guys legit sound and rap exactly the same!
Basically what everyone else said, you can distinguish them by subject matter cause Malice has always been introspective and seemed like he was sorry, Push don't give af and is unapologetic