Note: A modern Windows PC with a Ryzen 9 7950X scores over 5000 cb natively. Apple Silicon via Rosetta 2 is impressively close.
If you’re upgrading from a 2015 MacBook Pro to a 2020 Intel Mac or an M1 Mac, most online forums and review sites from 2014–2020 used R15 scores. To know if your new Mac is truly faster, you need the same benchmark.