You are digging quite a hole if you haven’t paid off one payday lender, and yet, are looking for another one. Pretty soon, you won’t be able to pay any of them.
Most if not all of the online payday lenders are just as you said: fill out a form and get sent to another site to fill out the form again. This is how they get your personal info, sell it, or even some will use it to take an application fee from your bank account.
If I were you, I would suggest increasing your income to pay off that first predatory loan you have instead of digging in deeper.