You can add other M3 models for some of the efficiency benchmarks. The headline still holds true when comparing to M3 Pro models (though the exact efficiency diff depends quite a bit on the exact M3 Pro model/core count).
Again, the result holds for all M3 Pro models. The Apple M3 Pro 11-Core even takes the lead in terms of efficiency in some of the benchmarks. The text makes multiple direct comparisons between M3 Pro and M4 Pro efficiency.
It looks like they don't have benchmark results for Cinebench 2024 for some older models, so they're only shown when you switch to Cinebench R23. The Witcher 3 benchmark, for example, does show M3 Pro numbers by default.