I have the Zulu and the Bose. I like my Bose but Zulu wins hands down.
Whereas, both have good noise reduction, Zulu is noticeably better in
blocking out the noise. The Zulu has the bluetooth that syncs with the
cel phone. Bose doesn't. Very handy when making a call from the ground
or low altitudes, as you don't have to cram the cel phone between the
headset and your ear. Sound quality when listening to iPhone music is
much better, too. The music mute button is handy and can be pressed
before transmitting.

Bluetooth is handy because you can hear your cel phone in your headset
and talk on your cel phone into the headset's microphone. Your cel
phone is nearby but there aren't any wires connect the two. If you
don't like bluetooth, it also has cables inside to simply plug the cel
phone into a side jack on the cable controller, which Bose also does
not have.

I think these "how to" instructions are clearer than the manual - To
set up your cel phone for bluetooth pairing mode, be sure bluetooth is
off on the headset (blue light not flashing). Set up your cel phone
for bluetooth pairing mode (if you don't know how, ask a teenager),
hold down the bluetooth button on the headset for a long time until it
flashes red and blue. Then enter in the bluetooth sync code 0000 in
your cel phone when you are prompted. You have to turn on the headset
AND the bluetooth each time you use the headset in order for bluetooth
to work. To answer the cel phone you simply push the same button on
the cel phone that you would push to answer it regularly, but you'll
be able to hear and communicate through your headset. By the way, I
have nothing to do with either company, just attempting to give a
helpful opinion.