When comparing Planescape: On Hallowed Ground vs Cityscape, the Slant community recommends Planescape: On Hallowed Ground for most people. In the question“What are the best D&D books from previous editions with ideas for Dungeons and Dragons 5th Ed.?” Planescape: On Hallowed Ground is ranked 1st while Cityscape is ranked 2nd. The most important reason people chose Planescape: On Hallowed Ground is:
Several chapters are dedicated to exploring the potential interests, intrigues, machinations and mortal interactions of divine powers.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Divine interaction
Several chapters are dedicated to exploring the potential interests, intrigues, machinations and mortal interactions of divine powers.
Pro Real-world and D&D pantheon references
On Hallowed Ground details the gods of 20 pantheons, half of which are historical.
Cons
Con Missing some pantheons covered elsewhere
Notably, Deities & Demigods (1st Ed.) presents every historical pantheon in this book, plus American Indian, Arthurian, and Central American.