The way I saw it was that the Tobias/Ace move was in essence simply a block pass, accurately carried out be it close/harsh, and Ace had options. Ace should have gone.
With the Kyle/Zac one it was always going to be close/harsh, but the manoeuvre was poorly executed (there seemed to me to be significant contact). But on balance a racing incident, part and parcel of the spectacle we love to watch. If Zac had fallen (any which way) it would have forced the ref to exclude Kyle.
Both incidents were on the edge racing, fit for a final.