For giggles because I did the math: without any expenditure of resources, the wizard is sitting at +10 diplomacy to the rogue's +9. The gulf gets larger if I actually start casting anything besides cantrips.
Argentum wrote:v2 wants the PCs to bring v1 under their rule, convence v1 that their leader is bad, and have the leader deposed as ruler.
lets say the leader himself is a 3rd level fighter. he also has 10 guards who are 1st level warriors.
v2 has no PC classed inhabitants. they have 5 1st level warriors however.
For ease of use I'm going to make notes where class is irrelevant to what's being done. If both classes can do something equally well, I'm not counting it either way.
The party arranges a private meeting with the leader of v1 (both). There are a few ways to proceed:
1 - Diplomacy. Advantage: Wizard. (+10 vs +9, assuming wizard is built for diplomacy)
2 - Bluff. Advantage: Wizard. (+10 vs +9, assuming wizard is built for bluff).
3 - Sneak into V1 mayor's house in the middle of the night and steal something important enough to blackmail him into surrendering. The rogue can stealth, the wizard can invis. I'll call this one equal.
4 - Run a scam on V1.
What scam? Well that depends. I'm still assuming the wizard has a diplomacy or bluff that's comparable to the rogue's.
I could disguise myself as V1's mayor. If the rogue's trained in disguise, he's got a +9 base. The wizard, meanwhile, has a +10 from casting Disguise Self with absolutely zero skill ranks. If, for whatever reason, he's trained in disguise the difference between rogue and wizard only goes up from there. Advantage: Wizard.
I could run a smear campaign that the mayor's been seen consorting with devils or that the gods have declared he or anyone who consorts with him is a sinner. The rogue could combine the whisper campaign with sapping someone in the night and making sure the body is never found, but the wizard can summon a Lemure and have it chase villagers that have displeased the mayor. Advantage is to the wizard, because if it's done right I never need to make a single social roll.
If I want to brute force, I cast an extended Charm Person on V1's mayor. That gets me 8 hours of him being friendly to me, at which point I convince him to leave. If I'm the rogue, I just sap him and carry him off in the night. I'd call this a wash, but Charm means I can have V1's mayor publicly and legally surrender V1's leadership to V2. So equivalent ish, but slight advantage to the wizard.
I'm sure there's other options for the wizard, but I can't think of them. But overall? The wizard's going to have a much easier time of it.
Cursing is like a spice. And sometimes you're making thai.