Honestly, don't think you can go wrong with any of the 2. I would say grab the one that is available and in the condition you like.
I played both, have DP Pro on order sine July 2021 and got pushed back to July 2022. I was able to get my hands on a NiB GZ Pro and don't regret it at all. Stayed on the list for the DP Pro.
If you can only pick one, do a heads or tails and if you are happy with the winner that is the one, if not, then the winner is the other one! Lol