On session replay, clarity if definitely comparable to an extent. Keep in mind that the tool is very fine-tuned for a more marketing use case (w/ heatmaps, analytics, etc..). On the other hand, Highlight.io will monitor the content of network requests, trace request all the way to your backend, let you inspect the DOM, report on errors and much more.

Regarding the request features I mentioned above, we launched several features in this space today in our launch week: https://highlight.io/launch-week-2#day-2