Well I have both..I have no need to chop down a big tree and only use a hatchet as a camp utility & game quartering tool so I got a mini when they came out..
Great quality and great company by the way, but I eventually wanted something with a bit more heft for pounding tent stakes,etc. .. Since I had no need for an axe I got the GB wildlife last year before hunting season.
Since I hike in & "still hunt"(I.E., crawl at times) from the ground with my bow,I quickly got annoyed with the longer handle of the wildlife,which was un-needed for me.
I cut the length the same as a mini and for my uses it is the best of both worlds. I can choke up on the head and without having that extra few inches of handle jabbing my sides and elbow and it still has enough weight to chop anything I need to chop.
I only carry a small skinning knife so this is the best combination/emergency survival set up for my back country hunts since I can do most anything with the two.
I did need to wrap the handle with 550 cord since it was skinny and made a wrist loop so it wont slip out when chopping. I used black 550 cord, but it looked like some sort of "ninja" hatchet, so I spray painted it tan.. Here in liberal tree hugger California I get less stares with this short looking hatchet than a big knife, of course having a bow in my hands probably keeps em at bay too.
I carry my hatchet in a Bianchi pistol holster so it keps the weight on my waist and holds it tight to my side without flopping around or rubbing my hipbone.
You can't go wrong with the GB brand, they will have all of my business..My first wildlife was just a bit rough on the head alignment and I sent them photos of it..The contacted me 3 times to apologize and work on fixing the issue and sent a replacement,,It was the most beautiful dark hickory handle I have seen, but I prefer function over fashion so I had to cut it.