I'm 90% sure that $1,104 is the price without taxes. The price with taxes is $1,175. I renewed my pass (formerly Platinum, now Incredi) in May and it was $1,175 and change, including tax.
There is no advantage to renewing it in the park and there is really no advantage to waiting . . . since . . . they could raise the price. If you're within your renewal window, you intend to renew, and you have the funds, renew now. The expiration date will always be one year from the time the former pass was activated, so you don't lose anything by renewing at the earliest opportunity.