When mixing the different Flight Sims, FS2004 and FSX in Multiplayer, even when using approximate default settings, slight differences in the scenery appearance, positioning and altitude, soon become obvious, (especially during screen shots).
It is a fact that each Pilot in a group sees a vastly different scene than his fellow flyers...
..which is a bit of a shame, when you come to think about it...

...!
I often think to myself; wouldn't it be FAB if my flying companion could see my bit of cool scenery!...

...but that never happens!...

....!
Paul...G-BPLF...FS 2004...and a bit of cool scenery...

...!
P.S. Luni was using FSX, I was using FS 2004.... 8-)...!