I have used them all and in my opinion for the way I hunt which involves using the catch dogs to be athletic and have the ability to run more than 40 yards the Aussie style catch vests are by far the best they offer plenty of protection without chaffing the legs or effecting mobility.
I also love how they are all one piece from collar to vest b/c there is no gap in the front & its much more conveniant for regular use.
They have different styles and I get the ones with the most protection and added on leg pads. Not all there models are good for our style of cd but the ones that are simply offer the best of both worlds. Google Duncan pig dog supply.
Here is a pic of the smallest version I use for summer (not the 3/4) with light shoulder protection.
