Jim, I would try them both out and purchase them from a company that has a liberal return policy. I suspect, after playing for a few weeks with a pair of EV-10Ps, that you will go with the Bose S1s. For me, the EVs lacked both clarity and bottom end, but they may work for someone else.

Good luck on whatever you decide upon,

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)