[marfish]

What's the relationship between Called Shot (Edge action) and Call A Shot (Minior Action)?
Is Called Shot depend on Call A Shot or what?

The naming is just confusing...

[Xenon]

It seem as if you have the option to either take one of the Called Shot Edge Actions (by spending Edge points together with a Major Attack Action without a negative dice pool modifier and without spending a Minor Action) or via Call a Shot Minor Minor Initiative Action (in addition to / together with a Major Attack Action) that generally come with a negative dice pool modifier of 4 dice (but does not cost any Edge points).

[marfish]

It seem as if you have the option to either take one of the Called Shot Edge Actions (by spending Edge points together with a Major Attack Action without a negative dice pool modifier and without spending a Minor Action) or via Call a Shot Minor Minor Initiative Action (in addition to / together with a Major Attack Action) that generally come with a negative dice pool modifier of 4 dice (but does not cost any Edge points).

So, they are independent to each other?

[Xenon]

Depend on what you mean with "independent" I guess :-)

Disarming someone with an attack seem to either cost you 5 Edge points (if you take it as an Edge Action) or 4 Dice to Hit (if you take it as a Minor Action).

Aiming for vulnerable/unprotected parts seem to either cost you 5 Edge points (if you take it as an Edge Action, in which case it increase damage by 3) or 4 Dice to Hit (if you take it as a Minor Action, in which case it increase damage by 2).

Firing out of full cover seem to either cost you 2 Edge points (if you take it as an Edge Action) or 2 Dice to Hit (if you take it as a Minor Action).

[MercilessMing]

Yes, they're independent of each other.  Two ways to do similar things.