NPD and VGC are the same, but the NPD has better sources to extrapolate from. The only real 100% accurate data is Sony's (and the others) shipped figures.

Anyway, 0.1m out is within the desired error. It's fine

Ah, thanks for the info. Still, 300k off the real number (or about 7%) still isn't too shabby.

Vgchartz has around a 10% margin of error, so to me being 100,000 off is acceptable.
Anything more then 10% time to burn site down with fire and oil.

You're right. NPD and VGC strive for the same goal....so why introduce a totally irrelevant figure into the mix?

The only thing that the shipped figure does is tell you your hard ceiling figure. It has some small relevance to retail sales, but there is potential for a massive buffer between the two...

3 days of the year missing.

Find it funny though, MS meant shipped to some when they said 3 mil. It's 100% sold through though when it comes to Sony. LOL!

Sony is pretty much sold out, Ms is not.....pretty easy to understand. Either way makes no diff, easy to see what is selling btter.

Seriously, anybody who takes offense to 100k difference belongs with these miscreants:

http://systemwarsmagazine.com/2013/09/16/report-gamespot-reviewer-gives-gta-v-a-generous-score-readers-want-her-fired/

I'm thinking it's going to be close, but yeah I'm still confident in my prediction. I just got back from my local best buy. They had 0 PS4s, 6 Wii Us, and 10 XBONEs out in the game area. Anectdotal I know, but still it supports that sales will drop this month by a lot.

I couldn't understand it myself. Sony announce 4.2 and VGchartz then adjusts there numbers to 4.1 million. Why?

They were 300,000 off but adjusted the number after Sony announced the official 'sell through' numbers. That's why it's odd.