Wow, 8:1 to 10:1 would be insane! I mean, there are pc sales to considere, and this game probably got some numbers on pc, at least 500k perahps? so... do you think xbox sales for Nier are around 300-400k?
yeah that's pretty much exactly what I think. Monster Hunter World is around 1m physical on X1, so let's say 1.3m in total and that's a far more known franchise that released at the same day as the PS4 version and is also physically available. Resident Evil 7 has very similar numbers.
I don't see how Nier Automata would be anywhere close to that. Around 500k lifetime (unless they release a physical version, which could push sales a bit).