I tried both and preferred the comfort of the Lightspeed Zulu II.
Definitely worth trying yourself.
If you aren't in a hurry, the Zulu PFX is due out in Spring this year, priced above the Zulu II.
note - if you have an old headset there is a trade-up program on the Lightspeed website
Lightspeed Aviation - Trade up your old headset for the latest innovations in ANR
Enjoy - which ever you choose!