I'm not familiar wit those, but here are some construction tips to consider. I used a nylon no-name ankle rig from an outfit in Lakeland Fla for several years. It had a garter strap which went between the knee and top of calf, then the body of the holster had a wider strap which cinched down with Velcro. The holster was your basic nyoon with a tie down strap for the hammer on the Sith. It worked OK. The nylon was kind of hot - no sweat band. The carry was a bit high, which concealed well if you sit down in public places - but made for a slightly slower draw.
I have switched to a Ken Null ANK ring now. It has a much thicker band and a form fitted horse hide holster - versus the rather shapeless nylon from before. The band is backed with felt and disapates sweat well - not hot spots. It carries lower on the ankle than my older rig - which is OK, but I try to be aware that the bottom may show below the pant leg when sitting down. I stick with black socks - or pull the sock over the rig - for more camo. There is no garter strap with this rig. I can say that it fits well, and holds tight even with no tie down strap. I can't shake the gun loose.
The Ga GBI uses a Galco design that is similar with a fleece backing. My nephew - an agent - is pleased with it.
In summary - look into the backing on your rig - some form of sweat disapating material is a real plus. A boned holster fits and is more stable during activity than a nylon "pocket."