Which one would you buy?
Trumps painting will fetch only $15000
JFK's painting
Trump's sketch was donated to a charity in 2005 and is expected to sell for at least $15,000 ... but that's only a fraction of what JFK's expected to fetch.
Kennedy's piece is slightly more sophisticated -- an original oil painting from 1955 signed by the former Prez ... which hung in Robert F. Kennedy's Hickory Hill home for years.
The artwork is believed to be one of just 2 known JFK paintings ... the other ensconced in the Kennedy Library. It's expected to fetch around $50,000.
TMZ