I only have the Maxpedition sheath, so I cannot comment on which is better. But I can tell you about the Maxpedition.
It is very well constructed, very heavy duty at the expense of being thicker than many sheaths. It feels like thicker, better quality cordura than my SOE sheath. Just to give you some perspective on the thickness, the Maxpedition with a velco lid is almost as thick as my SOE with fas-tex buckle.
The lid is adjustable, it has about 2 1/2 inches of velcro with a small elastic keeper on the inside of the sheath to accomplish this. The velcro to adjust it is hard to get to though. Of course, being able to adjust it is really only a consideration if you have something really long to put in there, like some Surefire lights.
The velcro on the outside has 2 1/2 inches of hooks, 4 inches of loops. It is very secure.
The horizontal loops are 1 inch thick with 2 inches of velcro, and can easily fit on a belt over 2 inches if necessary There is 2 inches of space between the loops to allow for vertical carry. The vertical belt loop is 4 1/4 inches of solid velcro. The horizontal belt loops would be secured around it to provide for even more security. Very heavy duty.