It is not that strange. Solskjaer has obviously tried using Martial the same way Klopp use Firmino. Just look at his comments about him.agreed. very strange comparison that the OP has made.
I think Martial might be as talented as Firmino. But Firmino, for now, make better use of his talent. He is a really hard working fighter. Martial is close to the opposite.
Firmino was actually about the same age as Martial is now when he arrived at Liverpool. If Martial use the next few years well and build his physique he could become a world class striker. But I really doubt that he will.