If you can find one of the older Nilakkas thats has a zero grind, id get that. Now you will need to do a lil work and hog of some of the damaged steel but afterwards its one hell of a cutter and it feels great I hand and top notch fit and finish. You can still zero grind the new ones (im going to do that soon to mine) but it will take more work. I just don't like that knife with a secondary bevel, it wrong. If not thst the 940-1 is a great knife. Based on what imo is one if the top 3 edc knives ever (for me para 2 is #1) and made even better (depends who you ask, for me I love the cf scales but would prefer m390 or m4 over s90v) with upgraded scales and steel, all in a lightweight, fun to play with (axis love) package. Memory is nice too, I just wish Japan made spydies weren't 95% vg10, it gets borring. Slap some super blue and a very thin grind and that there is a winner. Overall you can't go wrong with either one, all 3 are great just depends on what you're looking for in a knive.
Good looks and easy to sharpen steel? Memory
Classic design and grat cutting ability? Original batch Nilakka or have the new one reground, but then you can do that to all 3.
Edc perfection, great looks, fun and tough lock, wear resistant but long sharpening steel and highest price? 940
If it was me it would be a battle between nilakka and 940, depends on the price too since 940 is about $100 more expensive. Id say 940 is a better edc knife overall since its a good 2 oz lighter and more fun to play with. Cutting ability goes to nilakja but 940 is no slouch either, benchmade usually grinds them relatively thin.