Not really. The mechanics behind the two don't have to be remotely even comparable. They can be, but they needn't be. You can do "more is always better" without relating at all to "X amount of cities is ideal".
The proper way to handle "more is always better" is to challenge the player in getting more. If it's difficult to expand past a certain point, then it won't always be better to expand outwards as circumstances change throughout the game. The trick is making the struggle to get large meaningful, and yet do so without feeling truly penalizing (and avoid having the hard wall of "cities settled past this point won't contribute fast enough" come too early). It's also done in a way that can make people of various play styles happy, as a peaceful player will be content to sit back once they've established their empire and the land is claimed, switching to a purely inward focus, while an aggressive player can expand their empire through conquest.
That's a totally different mindset than, say, providing freebies for X number of cities, encouraging a certain size.