Never played a Mya-Moe, but as of today have played two National resonator ukes. One was a wood-bodied concert, belongs to Michael Eck of Albany NY (A National Guitar Endorsee), and played a metal-bodied one at Sylvan Music in Santa Cruz today.
Enjoyed them both, but the metal-bodied uke has Aquila strings on it, and the wood-bodied has Worth Browns; The Worth strings were mellow, yet crisp - I really love that instrument!
I've never tried anyone else's resonator, so can't make any more comparisons.
Good Luck!
........... .........-Kurt