From perk description it is not clear to me if having a perk in list gives you additional bonus in probability modifiers, or it's simple skills percent bonus.
E.g. Ranger gives you description that with this perk you are more likely to have special encounters, and gives you a 15% bonus on
Outdoorsman skill. Is it equivalent to just increase
Outdoorsman skill the same amount to have the same effect?
Other example: Medic perk gives you 10% to
First Aid and
Doctor skills. Same as simply increasing this skills spending the skill points?
Simply put, does game actually check against having/not having specific perk? E.g. is just having a 80% speech, or having 80% speech with a
Speaker perk (40% base + 40% with perk) will result in same checks or not?
I mean it's obvious that perk checks are done to perks that does not give you skill bonus points (at least that you can see), like
Kama Sutra Master. But do percentage-bonus type perks (like
Speaker in example above) give any additional checks (not always of course) except ones that apply to skill value?