Already a thread here
https://www.candlepowerforums.com/posts/3388291#post3388291
It sure does look nice!!......I would love one of these to go on my 3 cell surefire light.
The Seraph is cheaper (which is why I got one) but I think you cant really do a direct comparison just like that.
They both have their uses and it seems one significant factor for the developement of the TX4 was to give Military and LEO guys a brighter light(without causing too much tunnel vision or creating that nasty bright spot on the wall some lights make when used inside),
and to give them a smaller less bulky alternative for their weapon lights. (important when moving around inside buildings? no?)
When u say the Seraph P7 cant work with a M2C......How so?
Both these heads are M series compatible and both require a M2C to work on a C series light.
Just go to the LumensFactory website and you will see they even sell their own M2C just for the Seraph P7.
BTW OpticsHQ has the TX4 and M2C available aswell if you are interested.