Change in type of visa

hi,
I am planning to move to KSA. I am selected as engineer by my sponsor. But my sponsor is offering me a labor visa and told me that he will change it afterwords to appropriate type.
I want to know what are the shortcomings of labor visa and is it easy to change the type of visa..?

It can be changed at a later stage. But from what I know is that labor visa type cannot bring or sponsor their families into the Kingdom.