CAT mock percentile and actual CAT percentile...how much they differ?

It depends on the type of mocks u r taking..i.e if u r taking ims' mocks(which is taken by probably the highest in the country so far),your actual cat percentile will vary by +5/+10 than the actual mocks' and if you taking cracku's mocks the actual percentile will remain almost same.Note- when i mention mocks it is about the later mocks i.e from aug-nov.