No you can't just say that. It's more the quality as whole that determines if the wheel is stirdy or not.

You have different quality in spokes, cheaper ones flex more then the expensive ones. And then there is the rim for wich the same applies.
The hub more or less decides how much miles you can do with the wheels. The bearing inside the hub may be cheap so they break down soon or the freewheel is made out of cheap materials.