Nice, flarp, way to go the extra mile on this.
I don't have any comparisons, because I sold my Delica4 a day after getting it. It's not a bad knife...actually a really nicely built one. However, I like the fact that the Leek is perfect for one-handed operation. I hadn't owned a back locking knife in ages and didn't realize how much easier the liner lock was to maneuver. I use my knife a lot while on a ladder and holding cable or straps in the other hand, so for me, the Leek stayed in the pocket and the Delica moved on to another home.