[samwillis]

This is a great comparison, but it depends so much on what sort of website or web app you are building. If you are building a content site, with the majority of visitors arriving without a hot cache bundle size is obviously massively important. But for a web app, with users regularly visiting, it's somewhat less important.

As ever on mobile it's latency, not bandwidth, that's the issue. You can very happily transfer a lot of data, but if that network is in your interactive hot path then you will always have a significant delay.

You should optimise to use the available bandwidth to solve the latency issues, after FCP. Preload as much data as possible such that navigations are instant.