It's really a shame Aetna Springs is NLE because I would have sent you there instantly over Northwood if it still was. Given the 10 round split, it's 8-2 in favor of Aetna for me.
I liked Northwood a lot, and for geeks like us, seeing the bones of what used to be is really special. However, Aetna was a terrific track as it existed, and my only great regret was that I made it there for the first time on the last day it was open.