I see no reason to doubt it.
GB scores out of context are fairly meaningless. A far better indicator of performance is a comparison using a real world task such as rendering of a large FCPx project. That will tell you how well your money was spent.
For most users, there will be little difference between the two—YouTube and internet surfing are highly unlikely to show a difference.
Gamers, AV app users, developers are among those who can benefit. Also, you can run higher performance monitors.
In any case, while GB scores are interesting, the numbers don't really matter.