Answer
These compounds are diastereomers.
Work Step by Step
Since the Fluoro and Methyl groups are changing their relative positions to the double bond, they are "E/Z" isomers.
E/Z isomers are considered diastereomers.
** This occurs because, despite the fact that they are stereoisomers, they are not the mirrored image of each other, which is exactly the definition of diastereomers.
