I was just asking myself this question last week since I had to sell either my SAR3 or GW...I had been using my SAR3 as an EDC since about may and I've loved it! Garth finished it off with a great convex edge and its overall performance, whether for food prep or for uses while in the woods, was perfect for my EDC needs (heavier duty stuff included). I also was quite happy with the handle in 75% of situations, until faced with situations where I needed the firmest grip possible. In those situations where I try to grip the blade as tightly as possible, the SAR 3 ends up being just a little small for my hands. I love the ergonomics and overall design but the handle is 30-40% too small for my medium hands.
The thing is, I never even realized this about my SAR3 until handling a GW! Almost [BOLD]stantaneously[?BOLD] after I first picked up and gripped my new GW, I felt a little sadness in my heart for my faithful SAR3. For all it's beauty and elegant, functional design, it's handle just couldn't compare to that perfectly swelled GW handle. After little debate, I decided to switch to the GW and let my precious SAR3 go because functionality is my priority and I ultimately have more functionality, control, and safety with the firmer grip that comes from the GW design...
Of course I only was ultimately able to let the SAR3 go when I decided that I would eventually replace it with a SAR 4, which I'm thinking will be a pretty perfect match for my hands.
Straight from the factory, I do believe the SAR3 performs better with its excellent geometry and sharp convex edge, but I am fairly certain my GW will be able to match it once I get around to convexing it.
The only EDC sized Bussekin handle that has felt better to me than the GW at this point is the Rodent Solution (definitely worth checking out)...seems like a similar design, but just a hair bigger.
Based on how well the Bear Cub HACK fits my 3 fingers, I have a feeling the similarly shaped, but larger AD handles will be pretty perfect as well...I still haven't had the pleasure of handling one myself so I can't tell you much on that front.
As has already been stated above, the only way to really know is to try them out and buy/sell/exchange until you find your perfection (just a warning though, based on my busse experience, it seems that the criteria for perfection are in a constant state of change ;-) )
Hope this helps!