Difference between shooting and finishing.And choosing penaltykickers and freekickers

[LesterMind]

I would like to know your opinions (as much opinions as possible) about diference (or importance) between shooting skill and finishing skill.

And I will try to post right down here an image (.gif) with my squad and your choose for penalty kickers, and for free-kickers (from left, and from right).

Please make your personal list using the squad number, for left kickers, and for right kickers, and for penaltykickers.
I don't know if it is important but 35skillpoints means 5stars (at my level 4manager).

General information of players...
Squad number
21-> left foot
11-> right foot (dribbler)
9 -> left foot (freekicker ability)
18->right foot
10->right foot (one-on-one scorer)
12->either foot
16->right foot (one-on-one stopper)
8 ->right foot
20->left foot
14->either foot (freekicker ability)
19->left foot (defensive wall)

Thanks for anwers!