talent = creative genius
stardom = the ability to mimic that creativity to monetise it

eg


diana ross and the supremes (talent) vs the spice girls (stardom)
johnny cash (talent) vs billy ray cyrus (stardom)
the beatles (talent) vs oasis (stardom)
grandmaster flash (talent) vs nwa (stardom)

or another way- talent creates a zeitgeist stardom plugs into it commercially

have i gone full on up my arse here or does it make sense?