Here is some 2D benches on air comparing 4050mhz and 4500mhz.
Edit: 4815mhz was not validated by cpuz :(
4050mhz runs - SuperPi 1m & 32m, wprime 32m & 1024m
Super Pi 1m - 11.544s
Super Pi 32m - 11m 57.429s
wprime 32m - 18.688s
wprime 1024m - 611.939s