I'm going to go of the basis of that awful comparison video, since that seems to be the focus.
I'm also going to go off the base of lyrical meaning that the lyrics of the artists are deep and meaningful, while mumble is just a good beat with some repetitive lyrics that follow suit (i.e. Lil Pump-Gucci Gang).
Eminem, Logic, Tech N9ne, and especially Hopsin are like the Wal-marts of "lyrical" rap. Yeah everyone might listen to them once in awhile, but they're afraid of being judged by it.
Eminem has some deep lyrics, but eh. Logic is the same way; He rubbed me the wrong way when he released his "Suicide Prevention Hotline" track. Saying "Woo!" after asking if anyone else feels the same over a suicide focused song just makes it seem like he is mocking those.
Post Malone-Rockstar should have been put into mumble. I'd personally even consider Congratulations into mumble just for the flow and repetitive lyrics.
The mumble portion felt fine although I'm surprised they didn't stuff Lil Uzi Vert in there.
Lyrical Rap isn't bad and neither is mumble rap, but it honestly just depends on mood. Are you being a big brained king? Then go with lyrical. If you're being a deep fried brain king? Then mumble rap is your pick. Both are great, and I will continue to bump to either of them. Except Eminem, Tech N9ne, and Hopsin. They're just awful in my opinion.