I have only handled an A2, never used one. My Trailmaster is one of my favorite camp knives, even though I have better and more expensive ones. It is the best chopping bowie I have ever used.
The carbon V holds an edge very well, and takes steeling and stropping very well also. I sharpens easily, and you can get this baby as sharp as you want. I thinned the edge out on my TM, and greatly increased the cutting and chopping performance. I did not have to thin it out greatly, but a little bit really helped. The TM is nicely forward balanced, which makes the chopping a pleasure. For close in work, the guard tends to get in the way, but this is not a knife for fine work anyway. I love the handles, nice and slim, just the way that I like them. Kraton is wonderful for grippiness when the handle is wet. I have not had any problems with my handle loosening, although others have reported this.
The A2 is significantly smaller and lighter, if my memory serves. I seriously doubt it can match the TM in chopping due to the weight and balance issues. It's convex edge is likewise very obtuse, at least the one that I was holding. Many folks here on the forums hold these knives in very high regard, and they are probably worth a look-see.
Comparing these 2 is probably not quite apples to apples due to the size differences. The price (if you shop around for the TM) is probably similar.