Don't know what Ethan feels, but he only feels that the man he is currently trying to save is a different man than the others.
Ethan could feel the difference the first time he met Daniel as if he had become different the first time he saw Daniel's face.
Even though Daniel is currently unconscious, it feels like Ethan can feel that Daniel is the one who makes Ethan's heart beat so fast. Yes, that's true.
Ethan put Daniel who was unconscious on a wide rock that looked like a table, the rock was in a cave as if someone had previously occupied the cave. But this time the cave was deserted, there were no occupants in the cave.
At the time after Ethan laid Daniel's limp body on the wide rock, Emily slowly drew closer to where Daniel was. With hopeful eyes.
Nicholas, Roran and Richard were also there, they witnessed something Emily was about to do.