This sucks to have to say and I wish it was different (maybe?....maybe that's what makes music interesting to some degree), but many people are going to hear each speaker a little differently. You might hear it the same or close to someone else, but if a person comments about a speaker you're interested in and their setup is different (hearing, room layout and acoustics, etc) then you might have a completely different take on them. For the most part people seem to feel the same ways about a speaker, but there are still differences to each person with a speaker setup. Literally the only way to be able to tell if you'll be satisfied is to listen to the speakers IN YOUR HOME. The next best thing? Just to listen to them! Hell, most don't even get that opportunity lol. You can definitely take a few things into perspective though like measurements, customer service, pricing, etc etc. It's a sick game, but if you order something you've never heard you just might not like it. You might love it though! Who knows. Only you.
Haven't heard MA or the Motion 10's, but I know the BB near me has a lot of the Motion stuff so you might get lucky with one near you. When I was looking into the RX-6's I found a few people describe them as a little brighter than what they and most others called 'neutral' speakers. I might have liked them, but I might not have. I'm sure they're good speakers for someone