Is the Kobo Forma Due a replacement

I had posted a couple years ago considering upgrading my Kobo Aura One the Forma was recommended as the logical upgrade, But now the Sage has been released. I am aware of some of the short comings of the Sage and wonder even though the Forma is still available is it due an upgrade??? I am in no hurry but if the Sage goes on sale I may give it a try....

JJ