Curious about the new Koren Even Israel Siddur (Nusach Sefard/Hasidishe)

I recently came across the new Koren Even Israel Siddur (Nusach Sefard), and it caught my attention.

According to the introduction in the preview, it follows the same nusach that Koren uses in its other Sefard siddurim, so I’m wondering:
What exactly is new about it, aside from the addition of Rabbi Steinsaltz zt”l’s commentary?

Is the nusach in this siddur in any way influenced by Tehillat Hashem, given Rabbi Steinsaltz’s involvement?

Also, how does this siddur, or hebrew only Koren Sefard siddurim in general, compare to ArtScroll hebrew only sefard siddur? Is there any real difference in addition to the font and layout?

Finally, just out of curiosity: could someone use this siddur to follow the davening at a Chabad House, or would it be too different?

I’d love to hear any comments or reviews you might have about this siddur. I enjoy exploring different siddurim, even if they don’t follow my usual nusach.