Stupid people, itchy fingers, simple questions and database explosions
===

Probably the most vague title in SO, but it is basically what I am up against (and by up against I only mean this thought in my head) I have a webform (form A) takes data puts it in the database makes reports the world goes round and people are happy. 

Now I am tasked with taking a similar form that has all of the original forms inputs, but it is for a different section of people. 

Form A - For Foos,
Form B - For Bars

Now Form A and Form B are VERY similar Form A has more information than form B so this statement can be made.

All necessary information needed for form B can be obtained from a completed form A.


Now here is where it gets tricky. Foos and Bars data cannot be stored together in the same databases. 

So (and here is where database explosions and my general lack of experience in web design and dealing with end users comes into play) if i give users the option of a checkbox to decide wether or not this report is for a Foo or a Bar how many support calls am I going to take because stupid people and itchy fingers couldnt answer simple questions. Oviously this is not an exact answer more of a generalization, but I am more curious as to learn from the experience of others. 

I will more than likely just end up making a new webform for the second report, but this question got stuck in my head the moment i realized how similar they were to each other.  

Thank you for your time and shared experiences.