My general experience over the last 48 hours testing Muse & dot for buying things: still not seamless enough on most sites. When it does work, it feels like magic.
Was constantly getting blocked and needing to take over such that it took me longer to supervise and nudge along the agent than it would take to do it myself. Tested mostly with retail & travel so far.
The main qualitative difference between the two is that Muse feels much snappier, and after getting used to the speed, my dot feels slow. Computer takeover was also buggier for me via dot than on Muse.
I look forward to this only getting better.