I have the Gerber Backpaxe (17 oz, the short version) and have purchased--and sold--the Gransfor Mini.
The Gransfor Mini has to have the worst performance-to-cost ratio of any hatchet on the market! That aside, its weight is poorly distributed, the handle is too heavy. There's simply not enough mass there for it to be a useful tool to split wood, although it works well for hacking branches off of stumps, but then again, so does your foot, or the Benchmade Nim Cub knife with a baton.
Slicing tomatoes, spreading peanut butter, yes, it probably does OK for stuff like that.
The Backpaxe is heavy by comparison - 17 oz - but I can also split 4 to 8 inch pine with it, which I could never do with the Gransfor Mini. The Backpaxe center of mass is all in the head -- the handle is a very light poly handle. You won't get lighter with carbon fiber or titanium, and the weight in the head is important for performance.
What I'd rather see for a small hatchet is something CHEAP because carbon fiber handles are going to break. So, a nice heavy ferrous head (7 oz would be fine, with a 3 inch blade (the hammer head would be essential) coupled to a 1 oz poly handle to make a half pound hatchet that would be a fine performer for small wood.
At some point though, we probably have to admit that using a hatchet is more therapeutic than practical, even for those of us that cook with wood on small fires, Bushbuddies, or titanium Shepherd's stoves. I find a hatchet practical for the latter, and more aesthetic for the former. But i still take one on short trips.