Upon further consideration, I think Wesspur advertised it wrong. They used a space to say, "something better is coming along, but you should get this quickly now even though it's the old version."
I think they should've used that space to say, "WOW Zoom KAPOW the new GRCS will do all these amazing things!!" Build that hype. Mention in small print that the old one will still be available at a reduced price, but build up the interest now.
I could be wrong, though.