honey will sweeten the brew more then brown sugar... Only about 70% of honey is fermentable, but its so dense it often packs more sugar into a smaller ammount, thats why it taste sweeter... I would adivse if your heart is set on it only useing about and ounce of honey and 3-4oz of sugar... Make your regular priming syrup with a small ammount of water, dissolve the honey in it and the sugar... you will get the taste and still have enough sugar to prime and not over sweeten your brew... i have used honey for priming once and it didnt work so well... You should let it sit longer then usal and be prepared for somthing you might not expect... not nessacrily bad, but not normal priming
Cheers