Time to separate the pros from the cons
The platinum from the bronze
That butter soft shit from that leather on the Fonz

from Jay-Z (Ft. The Notorious B.I.G.) – Brooklyn's Finest Lyrics on Rap Genius

Kelefa Sanneh quoted these lines in the New Yorker with this comment: “From the beginning, Jay-Z was admired for the quality of his verse. He compared his rhymes to luxury goods, as a way of flattering his listeners' power of discernment”

“That leather on the Fonz” refers to Fonz’s (presumably hardened / rough) leather jacket:

Note that cheap leather is hard and unconditioned and is thus less desirable.

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