Just because it has a larger volume won't always mean it's better, if the cores are crap it won't cool the air as well, also it might not allow the air to travel through at a volume that's adiquate to cool the radiator and oil cooler, causing over heating problems.
Just my 2p's worth I could be totally wrong. And it maybe a good buy. As I said I looked at one, but those questions came to mind when I saw the price.