The difference between “modeling” and “modelling” is primarily a matter of spelling. “Modeling” is the preferred spelling in American English, while “modelling” is the preferred spelling in British English.
Both words have the same meaning, which refers to the process of creating a representation or simulation of something, typically using mathematical or computer-based techniques.
For example, in the context of 3D computer graphics, both “modeling” and “modelling” can be used to describe the process of creating a digital representation of an object or scene. Similarly, in the context of statistical analysis, both words can be used to describe the process of creating a mathematical model that describes a real-world phenomenon.
In general, which spelling to use depends on the audience and the context in which the word is being used.