I can't fix these responsive problem

Hi TobiasBg,

I am using Tablepress plugin in my two different website.(different theme) One of them is responsive and one is not.

http://www.mattressplanner.com/memory-foam-mattresses/
Screenshot: http://postimg.org/image/4npoqfn0b/
There is a product comparison table which fully responsive. Here is the shortcode “[table id=3 responsive=scroll /]”. You can see first three table head is fitted well.Each table head have different size which makes good looking.

Another one is not responsive. Here it is-
http://www.nextgentoothbrush.com/oral-b-vs-sonicare/
Screenshot:http://postimg.org/image/dstwpxhyz/
I have followed same settings as i followed for above.
You can see each table head have same size And i think that’s the reason for bad looking table.I want table column have size (each will be different what size is needed) like the above sites.

I tried many times to fix these problem. Can you please suggest me how can i fix it ?

Best regards,

AL-Mamun

https://wordpress.org/plugins/tablepress/