Add me to the chorus who say you simply must hear them both and judge for yourself. There are it seems countless threads about Magico compared to this or that. By now the same responders are pretty much known and understood. There's just no substitute for your personal/direct listening. I've heard both brands numerous times with a variety of tube and SS amplifiers. I'd choose Rockport every time but that's me. You could prefer the polar opposite of what appeals to me. Go listen to both of them.
Good Luck,
Good Luck,