A touch faster? The slowest 2010 iMac is the 21" with an i3-540 Dual core CPU, Geekbench 4 is 2211 single/4466 multi. The Pi 4 is around 970/2000, less than half the performance.
The Pi 4 has come a long way in speed since the lowly original Pi, but its still not even close to a 10 year old desktop PC (or iMac).
More people (even in 2010) used laptops than desktops, and the Pi is in line with the numbers from the cheaper MacBook Airs at the time (I still have one that runs... though it’s getting some weird green lines on the display).
But I can say that working on the 2010 MBA is not fun; one of my webcams doesn’t even work with it (choppy at 30p), zoom is... slow at best, and web browsing is a bit choppy even with ad blockers. Even then, it is a smoother overall experience with that hardware and macOS than when I was testing 64-bit Pi OS on the 8 GB Pi 4 a few weeks ago: https://www.jeffgeerling.com/blog/2020/i-replaced-my-macbook...
The Pi 4 has come a long way in speed since the lowly original Pi, but its still not even close to a 10 year old desktop PC (or iMac).