Fortunately for you, Benchmade's Lifesharp service will put a nice hair-shaving edge on it for you. Call them and explain that the knife is extremely dull straight out of the box before use, and they may swap it for you or at least sharpen it for no charge (not even the $5 return shipping).
I think the fact of the matter is that it shouldn't come dull in the first place. Course it wouldn't matter to me since I re-profile all my blades right after I get them. However some people don't have those means.
As far as Delica vs Mini.
I had a Mini first, but after rocking the FFG Delica for a few months I'll never go back. After my buddy had a spring break on his mini while cutting through cardboard... it has made me very weary of the axis lock. I know its solid, but that shouldn't happen. Wasn't even thick cardboard.
Ergos - Mini is nice, but the Delica just feels better in hand. Handle is a bit longer and the thumb ramp + good jimping locks in your hand perfectly. Holding one in the left and one in the right you notice a big difference in ergos. If the Mini had a bit longer handle and more pronounced thumb ramp I think I would like it more (I have medium hands). Course that would totally change the design and may not be the same knife.
Lock - My Delica flips out just as fast as my Mini and both can be closed one handed. Obviously the Mini closes faster, but frankly I'd be more concerned with deployment than closing. My Mini takes me about one second to close, my Delica takes about 1.5 seconds to close... both one handed. Axis lock is far more fun to play with though ha.
Steel - In my own experience of rocking (I seem to like that word today) 154 for six months, it seemed to chip easy compared to other stainless steels especially to VG-10. The FFG Delica is the best slicer I've ever had, it just goes through everything like butter. That includes some one inch thick old dirty rope I had to cut through the other day (serrations? pssh who needs em).
Clip - Both rock, both leave about the same amount of handle sticking out... I think the Delica leaves a bit more exposed on the original clip. I have an STR low rider on mine so that isn't an issue. BTW, as a quick aside... STR kicks ass and if you are thinking about sending him a knife for a clip... just do it, you'll be very happy.
Defending My Life - I'd be more confident in the Delica if I ever had to defend my life with my knife. I'd much rather have something else, like a shotgun. But if I ever found myself in a situation where the only thing I had was my 3" folder I'd be more confident with the Delica. They will both cut, but with the extended handle, thumb ramp and functional jimping I wouldn't worry (as much) about my fingers slipping onto the blade of the Delica. The jimping and low thumb ramp on the Mini doesn't inspire much confidence if you ever had to thrust attack. Again, this is the worst case I'd like to think I'd never get into that situation.
Overall - I don't think you'll be dissatisfied with either knife, but my preference is the FFG Delica.