It'd be interesting to compare these 3 methods side by side starting with same beans.

I've tried, conservatively, a dozen and a half of different decafs available here in the EU, and some a markedly better than others. In fact, most are outright garbage with an exception of two that are virtually indistinguishable from each other even though they are from unrelated brands. So I wonder if the differences are due to the process rather something else.