So was in a workshop Friday and saw/used this - new option for running workshops, like Miro but more structure with timings and agenda etc.
(1) New Messages! (mural.co)
Tired of sharing docs instead of sharing ideas? Discover digital-first visual collaboration with MURAL. More than an online whiteboard, where everyone contributes equally and hard problems are solved faster. Bring MURAL to your next meeting!
Used Mural recently to run a couple of online workshops. They provide a range of useful templates that include easy to follow instructions 
Just been to the Miro site and looked at the available templates. Good number of new templates have been added. I think there is a “much of a muchness” between the 2 services. Miro have added a range of some rather interesting templates, for Agile projects as well as some presentation and workshop templates, amongst others. Hmm some inviting a 2nd and possibly a 3rd viewing.
That all said, the viewing of the Mural site did prompt a “re-think” of my approach or view of the “online whiteboard collaboration” functionality and how it could be used.
Thank you @jon_herries for initiating that alternate “direction of thought / approach” process.