What is the difference between this module and Matrix Field?

Yeah, the two have some similarities. What this module aims to do is provide a very lightweight and generic method to store the table data. So, with TableField you just get text fields for input and cannot select a different widget for each cell the way you can in Matrix.

However, a big requirement that I had for this module was to be able to define the number of rows and columns on a per-node basis. So, TextField will let you create multiple tables per node with differing numbers of rows and columns.

Thanks!