I've played both as a self-taught musician on both instruments. While I'd say the ukulele is easier to learn in general, please don't think the banjo is necessarily much more difficult. read more
The ukulele has easy to learn chord fingerings and fairly simple to discover note pickings. Remember that the ukulele, banjo and guitars all use the same fretboard setup, the difference is in the number of strings and the tunings of strings. read more