Last 2 nights I took both my X60vn and TN40vn spec 4 to compare. First night was snowing, last night was foggy, so not the best weather for testing yet. I did compare best I could side by side and here's what I got.
First Vinh's tested ANSI specs,
X60vn XML2-PDT 6500 lumens 550k lux
TN40vn spec 4 8820 lumens 500k lux
The first thing I noticed on lower modes up close was the tint difference, the 5000k XHP35 leds had a much nicer "natural" look, the colors looked much better outside. The throw is very close and the X60vn was just barely noticeable side by side at a distance. The TN40vn did have a larger hot-spot though which was nice, I would guess around 50% bigger, it lite up a noticeably larger area. The spill on the TN40vn was also wider then the X60vn, not a lot but side by side it was wider.
The DriverVNX2 was the best part, one hand single button operation with instant turbo just a double click away, can't beat it. Of course their is a substantial size difference too, the TN40vn was smaller then I was expecting and easily fits in my coat side pocket. I'll add size comparison pictures when I get a chance next to my other larger lights.
All in all I think I will like this light more then I thought I would, I am impressed overall so far.