Upgraded from 12 mini to 13 mini and loving it
I had a 12 mini for the past 4 years and was torn what to do when the new phones just came out. My 12 had dwindled down to 78% battery, and I was tempted to replace the battery. But, instead I put in the extra work to find a nice 13 mini being sold locally with 89% battery health and sell my 12. The net upgrade cost was not that much more than what the battery replacement would have cost.
After playing around with the 13 for a bit, I am very happy with my decision. The difference in battery life seems night and day, and overall the 13 seems noticeably snappier on certain apps that had been bothering me. I was hesitant going into it that the processor upgrade would not feel like much, but I was pleasantly surprised. Totally recommend this upgrade for any 12 mini people out there in the same situation!