[atlasunshrugged]

I don't have a UK/Estonia company but saw the comparisons a lot when I was working for e-Residency. My understanding is that it's pretty comparable in terms of being all online, solid tax structure, etc. For me the two biggest factors would be - where are my clients and how much do I care about having a company in the EU. If most of your clients/employees/ops are in the UK, I would probably keep it there, if they're in the EU or being part of the EU is important to you, I would consider Estonia (plus the instability of Brexit throws a bit of a wrench into the equation)