The Book of Souls:
If Eternity Should Fail -10/10 (one of their perfect opening tracks. Echoes of classic Iron Maiden in full force. I love it.)
Speed of Light - 8/10 (come on, it’s not that bad - a solid rocker. I could live without the cowbell, though.)
The Red and the Black - 9.5/10 (the instrumental section redeems it big time.)
The Book of Souls -10/10 (great, riff-driven track. Strong echoes of the old days.)
Death or Glory - 10/10 (I don’t get the hate. Maiden really needs more songs like this.)
Empire of the Clouds - 10/10 (a piece in its own category. I don’t play it often, but there’s nothing to dislike.)
Senjutsu:
Stratego - 9/10 (it’s good, but I personally prefer Death or Glory, even if they’re not directly comparable.)
The Writing on the Wall - 8/10 (I’ve never been a huge fan, and I’m not even sure why.)
Lost in a Lost World - 10/10 (a lot of people dislike it, but I’m on the opposite side - one of the best on the album.)
Death of the Celts - 8/10 (nothing wrong with it, but I feel somewhat indifferent.)
The Parchment - 9/10 (interesting, though maybe a bit too long. Could’ve been even better, but still solid.)
Hell on Earth -10/10 (one of the real gems of their later career, though not fully refined, imo - could use a bit more chorus repetition.)
Overall, I think I prefer the production on Senjutsu. Ideally, I’d take The Book of Souls with Senjutsu-level production.
Also, I’m not that into the Senjutsu theme. Give me Mayan jungles, pyramids, and sacrifices over samurai aesthetics any day of the week.