@TheDunmerRaven Lets say that everything about the two groups are the same, except for how well they are known on the server.
And for a third option as a control, lets say group C who have 5 members and are moderately well known but still the same in all other aspects.
Ok as BoneChi11er said recruitment is a challenge if you are unknown. They have more people and as you said they have the same effiency rate and time served. So yea obviously Group A is more powerful in terms of gear. With Group C next. Then Group B. The fame factor is next. Group B is easier to recruit. While Group C and A have a harder time respectivly. But they start with more people to make up for the unknown feature. So in a way you could consider them equal. But I'd probably have to give it to Group A just due to output.
@TheDunmerRaven Fair enough, How about we change the conditions.
So that group A is very well organised, group B are really badly organised and group C are in between.
All other conditions remain the same, and they are all known the same on the server.
Which would you think would be the most powerful?
Group A is organized so yea obviously the more organized the better, or so we think. If it is organized to the point of militant status it's members will grow discontent and an inevitable war would begin. If all members are on the same page then I would say that the faction would be unstopable. A common goal and everyone would work in unity. The faction would be near ultimate in terms of output. Raiding isnt as big of a thing due to unity and probably several bases.
Group B on the other hand is poorly organized. If by poorly organized you mean loosly organized then it may appeal to the loner crowd who prefer a loose relation of people with no definite teams and common storage. This type of a loose group would be debatable as a "faction"in the sense of the word. But if by poorly organized you truly mean poorly organized then it would most likely be leveled quickly. Unable to keep up with the documentation of players and not caring about who joins they recruit a few bad players and are quickly destroyed. But depending on the situation their downfall may be their saving grace. Unorganized they have bases everywhere and quickly relocate and rebuild. But as a general rule a poorly organized faction is not as fun as a decently organized one. It often falls prey to anarchy and the leaders are often to not found on. The faction doesnt go out with a bang but a whisper as the remaining members try to gather their forces.
Group C is the decently organized faction. It is a nice mix of both. Allowing both freedom and stability for its members. Its upsides are that it doesn't maintain a strict policy and is easier on the players. But at the same time raiding is more likely then Group A. It is a bit heptic at times and some players may feel they are pulling all the weight leading to discontent and eventual break off factions. It is probably lead by a few leaders. It probably has a strong possibilty of being one raid away from collapse as they havent organized a full defense/backup plan.
As far as who I think is the best. Well it is hard to say. Group B is at a bit of a disadvantage for a player like myself but some more trolly players would jump on board. Group A is fun until the player's ideas clash with that of the leader insuring a stressful war of drama and back stabbing. Group C is pretty good except the lack of a certain system may confuse and annoy hardcore players.
So I say a tie between Group A and Group C. But it is all case pertainate. It is all revelavant to the man in charge. Sorry for dragging on I just like this sort of discussion.