I have owned the Raven Eidolon in the past that has a similar claw, and I found it very uncomfortable. It hit basically right on my hip bone. The claw placement is probably different from holster to holster though, and certainly from person to person. I'd rather downsize to a G26 than have to...
In. People swear by these things. I'd be interested if they keep the gun stable while still allowing me to be comfortable. My current Raven Vanguard II is very comfortable, but the gun moves up and down vertically a lot, which results in some printing unless I fiddle with it under my clothes...
Relative to the DeSantis, the Alien Gear can be nothing but good. I had a DeSantis IWB for an LCP and I just did not like it at all. I've heard mixed reviews on Alien Gear- I'd say around 80% good, 20% bad. Personally I'd spend the extra money and just a Comp-Tac or equivalent brand.