In general, one with less people is always more apt to be friendly and accommodating because there's less people to take care of. But with that, it also (usually) means there's less they can offer as well due to less man power.
With larger FC's, there's more personalities, more cliques, etc. This can be both good and bad. Smaller FC's tend to be easier to figure out if you clique quicker because there's less people you have to get to know first (but if it's made between friends, usually harder to break into the group). So yes, smaller can be better, but it goes both ways really.