Images are either cropped/downsized at certain resolutions or file sizes (it is a lot smaller for achive.is than the WBM).
links on the playback page on archive.is don't show the original URL (especially problematic for multiple versions of the image that specifies the resolution and original)
WBM can take a list of URLs (either through email or through wayback-gsheets), allowing saving multiple URLs and AFK'ing, archive.is lacks this, and also reports URLs that failed to save.
News sites will especially be joining bsky, and that would be missed a lot if this limitation of unable to save/playback bsky pages continues.
As bsky becomes essentially the replacement of twitter, I'm concern about this issue that the WBM cannot properly archive/playback bsky pages: Here is what it looks like at this URL: https://bsky.app/profile/alexblechman.bsky.social/post/3khkeuzs2f42r
And here is the playback result, saving a blank page: https://web.archive.org/web/20240209024115/https://bsky.app/profile/alexblechman.bsky.social/post/3khkeuzs2f42r
While archive.is at least captures something: https://archive.is/9R9r8
Problem is that archive.is doesn't have many capabilities like the WBM:
News sites will especially be joining bsky, and that would be missed a lot if this limitation of unable to save/playback bsky pages continues.