NexGen Wars tracks the consoles sales (Wii/360/PS3 only) as VG Chartz does, but unluckily not as well... It may depend on from where the numbers are from.

    In NexGen Wars' case (where the numbers change in every second):

The console sales numbers you see on the front page of NexGen Wars are estimates, and are not intended to represent exact, down to the minute sales as only Microsoft, Nintendo, and Sony know the exact sales figures of their respective consoles. What we do here at NexGen Wars is compile numbers from NPD, Media Create, ChartTrack, as well as various other sources. We then take these numbers and, based on past sales trends, extrapolate the numbers out to give as close to real-time estimates as possible. Again, these are only estimates, but we are confident in our ability to bring you accurate and unbiased sales figures. Not only do we extrapolate the numbers out so they don't lag months behind with the official sales numbers, but we also update the numbers when new official numbers have been released to keep our estimates as accurate as possible.

    In VG Chartz' case (where the numbers ARE what they should be):

Unlike many other websites (which use manufacturer shipment figures and reports to estimate current console sales), VG Chartz collects data directly from retailers all over the world. Retailer sample sizes are small compared to professional tracking services, but are large enough to provide very accurate projections of the latest console sell through figures worldwide. We are the only provider anywhere in the world of weekly American sales charts and are expanding our data collection and coverage all the time.

Just compare yourself:

360

 

PS3

 

Wii

 

They can't track the exact numbers if they change them every second, of course, but they can at least try to do something about it (to make the numbers a little more real). An example would be to add 1 000 000 to the Wii-numbers, and continue with the same old estimates after that... THEY'RE TOO LAZY!!! Is that really so difficult to do??? The numbers show the quality of the site (how quick they update them), and it's why VG Chartz is so much better than NexGen Wars!

No need to bash other sites mate.
I personally agree that they are less accurate but there really is no need for this topic.

Agree with Rath (not with his sig, but the topic. LOL), this thread is pretty pointless. I think everyone here knows whether to trust VGC or NGW.

If the topic would have been "which one is correct", then we possibly would have had a good conversation about VGC and NGW.