Yeah it really is quite subjective. Ive had pills that have blown away pure mdma and vice versa.
I have found that in my experience when getting crystal mdma it has been consistently decent. Where as pills i have been sold literally duds or even worse something more sinister (piperazines come to mind)
That is not to say that your pure mdma source will be legit. Always best to get a test kit when trying something for the first time. A good ez test kit will help identify mdxx or something else.
Goodluck . I wish you the best experience i had with mdma, because i can assure you that feeling stays with you forever. Or at least it did for me

almost like a birthday you never forget