Arizona joined the Pac in 1978
Since 1978, Arizona has spent 141 weeks in the AP poll. During that same span Utah is at 136. 60 weeks since 2011.
Since 1978, Arizona has finished ranked 6 times with two top 10 finishes highest final ranking #4 in 1998. Since 2011, Utah has finished ranked 3 times (it will be 4 this year), but no top 10 finishes.
Since 1978, Arizona has played in 3 Fiesta Bowls. Utah has played in 2 major bowl games, but none since 2011 (Arizona played in the Fiesta in 2014).
AZ won a share of the Pac 12 in 1993.
Don't get me started on big time wins. Utah isn't close to Arizona there.
Utah is better right now, but let's not get carried away.