I have a framelock 440a leek, g-10 s30v, and a delica; of the three, I prefer the g-10 Leek. It's very grippy, fits my hand better, is nimble to handle (especially one-handed) and easy to manipulate for those small, light duty cutting tasks- it is the knife most likely to be in hand while fishing. The liner lock on the g-10 Leek seems secure enough for light duty stuff. I find the framelock version of the Leek to be a bit slippery, harder to grip. The Delica is a great little knife as well, wider flat-ground blade, great steel (I like vg-10, mine came razor sharp), a bit harder to close one-handed but with a bit of practice can be done.
It really is a tough call- if it is between a standard Leek and a serrated Delica, I'd probably opt for the Leek. Ask if they can order other models- if so throw a few extra $$ in and grab a G-10 Leek, its a great light duty edc.