I was a little afraid of that. Darn. You know, I've never heard a Maggie, but do own electrostats. If Maggies and stats don't sound too dissimilar, that could be a good idea, as the MLs should be "matched" to their stats (within reason, you get my drift). I used to have a ML ribbon/planar center, and it had a sweet sound. That's such a funny adjective, but sweet is what I say. What I first loved about it was that the sibilance was immediately and greatly reduced with certain tracks, but that was comparing to a POS speaker. The tweeter is made by BG, and I think all of these speakers by ML are actually using BG's.
One concern I have, depending on the design and orientation of these tweeters, is what the dispersion would be like. If the tweeter is rectangular, it will disperse best along the shorter dimension, FYI.
I suppose if it was me, if there was a significant price difference, I would go with BGs. If the pricing was similar, I don't know what I would do.
Um, if all things were equal, I might go with the one that was more SPL capable, and/or had more power handling, you know, just in case.