HD version may be better, but no way can it be twice as good as the one you got. And, it'll cost twice as much.
Don't miss out on this closeout. I think this is a better deal than the Zeiss Conquest close out below $300. I got a couple of those around $265-275.
I see non-illuminated VX-6's as low as $650. Check Ebay.
The VX-6 Duplex is so good, you really don't need the Firedot, although it's nice to have. Those are running closer to $800.
DF