Hi Ade
You normally have 4 weeks from the date on the letter to return your PiP form - that means it may only be 3 weeks depending on how quickly you receive the letter. However, you can request and you will be given a two week extension - but you have to ring and ask for it - if you need it - before your form is due.
It's hard to make a comparison of forms because I think it depends on individuals, their health conditions (and how much you dislike form filling!). The PIP one Is larger - but do start looking at our comprehensive PIP guide. It can seem a little daunting at 108 pages, but there is lots of help on how to fill the form when you get it.
www.benefitsandwork.co.uk/help-for-claimants BIS
