OK... My immediate impressions. The Merlins are more feminine, while the minis are more masculine. I love the Merlins because they are so delicate and loving/enveloping of the music they play yet dynamic/forceful. The minis are a counterpart that is more masculine and perhaps more pure/true to the source. This is the first thing that came to mind. The highs on both are equally extended. Cymbal brushes on the minis sound incredible, lots of detail and realism. I thought that since the Merlins use the Revelator tweeter they would have an obvious advantage. Not so. The highs are open, airy and huge on the minis! Wow! I would say again that they are like brother and sister in a way, maybe a sick way since Im saying it. hehe. Im not really faulting the Merlins in any way of course.
The minis do the mids really nice too. More apparent to me were the power/prominence of the drums in the track Eyes of the World, but since I have seen the Dead live, it is more how I remember the sound being. Nice! Heavenly.. really.
I cant compare the rest of the sound spectrum because thats all I focused on so far..
But those are my initial impressions.
Mike aa
PS. I did have to adjust levels and fiddle with stuff to get it copacetic. btw I use a sub with bothe the Merlins and the minis