Im not sure this will be helpful, so please dismiss it if not.
I planned for an upgrade this year and was dead set on this bike as a former Anthem 29 owner, as i loved the ride and suspension platform and kind of knew that together with the mich discussed “modern geometry” itd be the right bike for me. I waited ages for the reviews.
I ended up disappointed in that its been described as a thoroughbred Race bike. I spent time on the prior Anthem common upgrades to make it a more trail orientated so this for me was disappointing. Of course it can be used for trails, but wherever you read about it, its a race bike. I watched youtube vids, read reviews and recorded geometry
As I waited for the UK reviews to appear, i compared bikes and started to fall for the new Scott Spark. I analysed the hell out of the geo on comparison with my old Anthem revised geo, and the geo of my HT which just works and inspires confidence in me. Amazingly a large Spark was exactly the measurents i needed from stock and with the slacker HA combined with the twinloc i hypothesised its much more race/trail than the Anthem
So i jumped and went with heart instead of head and bought a Spark RC. Ive spent only 3hrs at Hadleigh on it so far but its a natural fit for me and is far more “trail” feeling than you can imagine, although rockets along like the race bike it is, and is very stable, manouverable and capable. I believe ive made the right choice although ive never ridden the new Anthem, and of course deliberately never will 🙂 I love the Spark already and it feels sublime with much more than the 100mm travel it has.
Of course its your choice, and id go further than I did and ride the Anthem first if you have doubts but remember Giant made and advertise it as a race bike for a reason