Islam is nowhere NEAR the wrestler Khamzat is. He's not even close to where Khabib was at.
He's much more oriented as a submission grappler than wrestling specialist and a far better striker than Khamzat, particularly his sophisticated counter striking game.
re: DDP, they didn't count on him doing 5 rounds of conservative point fighting, he was pretty ill prepared. JDM will show up ready to counter wrestle and its a much less difficult wrestling match.
Burns had a lot of success against JDM until he got wrecked, but JDM is also much improved every time we see him. This is a really fun and evenly matched fight.