In my opinion, you're paying a lot for the brand decal on the charger since you can get the same features from Hobbypartz in the Thunder AC-6 for $55. I'd be really surprised if Orion acyually made that charger. They're buying them from somebody in Asia and adding their name and their profit margin.

The Race Spec charger would be a much better charger, it has more than 3x the charger power, it will not limit current due to its power limitations like the on yoiu linked will on bigger than 2S lipos. If your lipos allow higher than 1C charginbg, this one will do that, the other will not, it doesn't have enough charger ouput power. You will need a power supply though for the Race Spec.