they both offer +5% critical chance. Light Touch is obviously for Light Armor only, and the 25% less critical hit chance by enemeies. Where finesse increases the critical chance permanetly. I only ask because I have a choice coming up at level 10 for a perk. I'm currently going with the US Army Combat Armor. But I am also considering doing Honest Hearts next and I am thinking about Joshua Graham's armor. So obviously if I do this, Light Touch would be the better choice at level 10. I just wanted to makes sure I wasn't missing anything. Seems weird that a perk like Light Touch is such a low level, compared to Finesse.

I should also say that I am playing with JE Sawyers mod, so my total HP is really low with this mod. So the reason I picked up the US Army Combat Armor right away, is the 15 Damage Resistance it offers, with 18 Damage Threshold. I won't be able to keep the DR with the light armor. So i'm thinking that the light armor might not be best, with this mod installed.

Finesse adds its critical chance to the part of the critical hit equation before the weapon multiplier - that is, for a Sil. .22 Pistol, Finesse's +5% becomes +15%.

Light Touch offers more or less immunity to critical hits, and its critical chance bonus is like the VATS bonus: Added after the multiplier. It's 5% for all weapons, from fists to Ratslayer.