I've been lucky enough to be gifted both these earphones, as disappointed previous owners, disposed them my way.
After one month of commutes, extensive hours in the tube, 8 aeroplane rides, multiple jogs, 6 hours Zwifting and many more typing away, I have a pretty solid opinion on what works. For concrete details on fidelity and ample scrutiny, you should read what the soundguys wrote, the critic below is just my biased analysis of having using them both for many hours.