Here, playing solo, Kress's tone (to my ear) is quite lush,
Love Song by Carl Kress (1939, Jazz Guitar)
https://music.youtube.com/watch?v=REvSHiqxd_8
and illustrates the "parlor" sounds that a vintage L5 can give you- emphasized here by Kress playing in a "plectrum classical" vein.
Alan Reuss had something of that quality even in a big band setting. Again, this is on an L5:
Allan Reuss ~ Pickin' For Patsy
https://music.youtube.com/watch?v=i5tJlXCZBes
It would be interesting to hear modern and vintage OMs in the same setting, or to A/B them against their archtop equivalents.