Both models are exceptionally detailed
Here’s a comparative review: Kato’s E231-500 Yamanote Line (part nos. 10-261, 10-262 / repackaged as 10-578, 10-579, 10-580) vs. Tomix’s 209-0 Keihin-Tohoku Lie (part nos. 92329, 92330, 8917). The Kato has since been repackaged and given a new set of part numbers, but is otherwise unchanged from what I describe here. Tomix has just announced that they are re-tooling their E231-500: The differences between the models would be interesting to compare.
