magneplanar and sanders

Hello,

I've owned several versions of Maggies and have been thrilled with them.
Aside from the high sound quality, they are so durable - my very set is still owned by a grandchild and it still sounds great.
I've been planning to upgrade my speakers to the Maggie 20.1 - and have asked here about the appropiate amps to use (and received very helpful information).
But suddenly I'm not sure - perhaps the Sanders electro-static might be superior?
Luckily I have two dealers here - one who does Maggies and the other that does Sanders. So I can bring my own CD and compare -
though likely there are some differences in room size and electronics and all the like (volume differences I can do out - I don't understand some stereo but I do play music seriously and can tell the difference between loud and good)
Has anyone here had any experience comparing these two sources? It does seem like I'm in a "win-win" situation - either choice can't lead to horror.

Best wishes
Nottop