Functional skills english ocr?

so i went to register myself for private examination functional skills level 2 EDXCEL but been told they offer OCR . what is the difference between OCR and edexcel board usually i get edexel pearson exams papers at colleges

OCR LEVEL 2 EQUIVALENT TO GCSE? whitch is better OCR or edxcel

i head OCR LEVEL 2 ENGLISH IS MUCH HARDER THAN EDEXEL am i right? in collleges they giving students edxcel so

I have been trying all night to get my head around OCR, Edexcel and AQA. Can someone (pref in laymans terms ) please explain this to me? Is one more recognised, is one more basic? There are such conflicting opinions on the net.

Also, how / when should I find out if my son is doing foundation or advanced? Am I right in thinking it's the equivalent of Basic and General (like when I did my O'Levels?).

Thanks again