We haven't done a formal price comparison, since it's actually a bit hard to compare apples to apples since the two databases are architected differently. Definitely something we should consider doing! Thanks for the idea.

Migration wise, I would use Outflux for batch migration and Telegraf to support a live migration (https://docs.timescale.com/v1.3/tutorials/outflux) and (https://docs.timescale.com/v1.3/tutorials/telegraf-output-pl...).