Well, I have a number of VMII's and I have 2 of the #1 Heritage holsters. I can't give you a definitive answer, as holsters are so personal. But here are some observations from someone with both. Hope this helps some.
I go back and forth between them as to which I like better. The VMII is definitely the most stable -- it spreads the weight out along the belt and there is little to no movement of the gun.
The Heritage will allow the gun to move around a little as you sit down, get up, etc. -- not to the point that it is out of control or anything, but it does allow a little movement - some people (me included) think this makes them a little more comfortable when you are going to be sitting for extended periods of time, like in a car for a long trip.
The Heritage has the water barrier, but the VMII is made with horsehide on the inside -- neither one has ever sweated through on me (I live in Texas and sweat profusely in the hot months.)
The Heritage stacks the loops on top of the holstered gun, so the whole package is thicker than the VMII. The VMII spreads out a long away fore to aft on your belt -- takes up a lot of real-estate.
Both have top notch construction and will last for many years.
Either one will be excellent at concealing large pistols.
If I had to recommend one over the other, I would probably tell you to go with the VMII. It seems to please more people, so statistically you might be more likely to be happy.
The attachment, if it works, is of a SIG 229 SAS in a Heritage cordovan.