For most scenarios, the experience should be better with a well-designed SPA as while first load may be slow, and person may have to wait a min. Once loaded data transfer per interaction is much smaller. For a use-case of just loading a page reading it and submitting few fields on it, will be worse. But for complex things like multiple filtering, searching for different dates, seat selection it will be faster.
One difference is that server interactions on a MPA are usually more predictable. I can wait for a good internet connection to submit a form or click a link. On top of that, I'm using browser navigation to navigate a lot of the time, and while it's not impossible to provide good feedback about interactions in a SPA, many sites don't (or worse, use optimistic UI updates without handling failure states well so it's impossible to tell what's persisted and what's not).
