The calc for Gen7 and Gen8 are the same. I dont get what you are trying to proof here.
You simply calced with the wrong form, thats all.
"Please read and understand what someone is saying, trying to prove yourself correct isn't the best thing to always do"
Also, I will be just ignoring the fact we are comparing +2 Hawluchaa behind a substitue to Ash-Greninja now on this thread.