During a crossover, wraps become a second hobby. Glow treatments, sketch lines, and team photographs compete with the actual fight. Readers then ask whether the rare wrap contains a different last page.
In the sessions we have run, the interiors usually match. When they do not, the difference is a short backup or a recap, announced in the public notes, not a secret ending tucked behind a holographic finish.
Count the story pages. If the count matches, you own a display object and a reading object that share a plot. Label them. Future-you will thank present-you when the next event drop lands and the shelf looks like a poster shop.
Web Field Line does not rank wraps. We only refuse to call them chapters.