Sync is a tad slacker I believe (the tables being for a 120mm fork).
Interesting point in the STW write up of the Sync about people having a nice 29er HT as a do it all and not bothering with a FS, I’m thinking along those lines myself. Many times if I really need an FS I can likely rent one.
I ride my Salsa Selma with a 100mm fork which gives a HA of 71 degrees-ish (the geo table says 72 degrees with 80mm), it’s not a slack bike, I don’t think I’d say the Sync is either. The Selma is spot on for twisty turny rolling trails, as soon as the terrain gets swoopy then my Yelli (68 degrees) comes alive.
But a reasonable pilot could ride either near anywhere.