Merging information of two almost identical forms.

I want to merge information of two almost identical forms. 

If the forms are identical, then you can simply use the Import App to import the data from one form to another identical one. Just export the data of the first form into excel then use the import app to import that file to the second form. Here's a guide that can help you set it up: Import App: Easily import your Excel or CSV data into JotForm. If you need further assistance, please let us know.
Regards.