A:AnswerYes, you actually answered your own question. As long as both your PC and your iPhone have working Bluetooth, and it is turned on, you should be able to easily pair these headphones to them
A:AnswerI have been as much as 40 feet away and usually have no issues with reception. There are two walls and one has the chimney in line with the other room where I listen when I go to our pantry.
A:AnswerLook up the reviews on YouTube. If you also read the details or specifications for each product there is somewhat a decent difference. One of the biggest differences might be the headphone Jack, though.