As shown for NGC 6441 & 6388, there is a quite wide group of
metal-rich GCs in M31 which share the FUV-excess + Blue Horizontal
Branch anomaly.  Most of these objects are among the brightest
metal-rich GCs in M31, brighter (i.e. more massive) than omega Cen in
the MW.
Coupling UV-GALEX and NH-3360 A observations in the integrated light
of MW + M31 GCs, one might conclude that in M31 (and maybe in M87?)
there is an "indirect" indication of the existence of multiple
populations of GC stars (He-enriched?)  as detected from the
spectroscopy and photometry of individual stars in several MW GCs.
This evidence could ask for a deeper study of the impact of a possible
"age-metallicity-helium" degeneracy in the cosmological use of stellar
population syntheses.