When it comes to the cpu scores in geekbench they are the same is what I meant. I agree the 5 core gpu will be very nice.Basically the same is a little misleading in some aspects, and the title is a bit of clickbait. Better GPU is an important difference in driving the iPad Mini screen.
Here's the official line on the processor:
The iPad mini 2021 uses the A15 Bionic chipset, which is also in the iPhone 13 series. According to Apple, this will include a 40% faster CPU and an 80% faster GPU than previous iterations of the device.
Even thru both have the A15 inside, Apple made sure that the iPhone 13 would be considerable faster then the Mini 6. Sort of to bad that they did turn down the speed of the A15 SoC on the Mini 6.The A15 in the iPhones runs at a little over 3.2GHz, so they seem to have downclocked the iPad while giving it the extra GPU core to help push pixels.
If it had 6GB of RAM, I'd say these were 13 Pro chips that didn't quite bin out to run at the full clock, but that clock speed appears to have been a deliberate choice, and an odd one at that.