The differences between 16610 vs 116610LN are
1. Bezel. "CERACHROM" ceramic bezel on the 116610
2. Hairspring spring. 116610 uses blue parachrom hair spring
3. Dial. maxi dial on 116610
4. Hands. Fatter hands on 116610
5. Clasp. 116610 fitted with Glidelock clasp
6. Watch case. 116610 casing is more squarish
7. Date cyclops. The cyclops on 116610 is coated with an anti-reflective coating
8. Lume. Blue lume on 116610 and green lume on 16610
And finally, there is a huge difference in price.