Ultron Sentries vs Swarm of Animated Books: who would win?

Too close to call

Ultron Sentries · Marvel · Base

Tier: 9-B
Attack Potency: Wall Level
Speed: Subsonic
Durability: Wall Level

Swarm of Animated Books · Dungeons & Dragons · Base

Tier: 9-B
Attack Potency: Wall Level
Speed: Subsonic
Durability: Wall Level

A heuristic estimate from normalized VS Battles Wiki stats: tier, attack potency, speed and durability.