It can also vary between brands.
I have an S200 and also a SYM HD 200
These are "competitive" scoots, only 8cc apart in engine size (163cc vs 171cc).
The SYM is water cooled 4 valves, has 4 more horsepower (which is like 1/3 more) and is of course heavier.
They look similar but the steering geometry and center of gravity is totally different (and the SYM has much more weight over the front wheel due to the radiator being in the front shield, along with the capture tank).
They ride and handle COMPLETELY differently.
The S200 is great around town. It makes turns VERY nicely, maneuvers easily in parking lots, and is light and easy to push, put on the stand and generally man handle.
The SYM makes you work a bit on right turns (and BETTER not stall) is harder to hold up when stopped, is harder to back up (when parking - here in NY we park motorcycles back wheel to the curb), much harder to control in low speed maneuvers and in general not as good of a city bike. BUT, it is smooth and stable on the highway and hits almost 75 MPH, and the engine never sounds like it is breathing hard.
So it is not only the CC. These two bikes take the same tires, so you would think the ride is comparable, and it is not in any way. I don't think the s200 is a good highway bike at all, too slow and not feeling stable, OTOH I could ride the SYM on the highway all day without a problem. But if they were both the same color they would look very very similar.
So you can also look at different brands, until you find one you like that rides and handles the way you are looking for.
I am curious about the s250. It is bigger, water cooled, and heavier. It might be more like the SYM, but I wonder if you lose the local street handling in exchange for highway stability.