I took the liberty of placing kraine's shots of the L/R 3D images on the Sony VPL-HW50ES next to the L/R 3D images on the JVC RS48/X55 from cinetson.org (audiovideo.fr). I couldn't access the L/R images for the Sony VPL-HW50ES from audiovideo.fr as their site seems down right now.
Of course, this is by no means a scientific comparison, since nothing is controlled for (brightness, glasses setting, etc.).
But it seems to me that the JVC is holding up pretty well in terms of ghosting in this pattern:
Full-size image here: http://cl.ly/K9gB/JVC_vs_Sony-3DGhosting.jpg
Of course if the Sony image is much brighter than the JVC (as kraine is claiming, I believe), then this is an unfair (for the Sony) comparison.