The one which fits you better will be the better option for field use. The Prairie Hunter is a fantastic traditional stock, with a Monte Carlo roll over comb - certainly an easy carrying, nimbly pointed stock. The varmint thumbhole is a heavier, more full figured stock, but it's still remarkably light considering its profile. As I mentioned 6 years ago in this thread, the steep grip angle of the thumbhole stock fits my wrist more comfortably, so I deal with the extra bulk of thumbhole or benchrest style stocks - if that has changed at all since this was originally posted, it has only gotten worse, as my arthritis in my wrist and elbow progresses.

If the thumbhole stocks fit you better, then that's the better option. It's usually easy enough to find an exemplar to test fit at a nearby big box hunting shop. If nothing else, your comfort with an AR vs. the standard Axis stock would be a good stand in reference.

My wife likes her Prairie Hunter stocks. I prefer my Pro-Varmint and Thumbhole Varmint stocks. Strokes for folks.