Comet Lake is faster in real-world benchmarks, but Ice Lake scores better in accelerated workloads for niche markets thanks to new GPU-accelerated features and AVX-512 support. As such, Intel's marketing seems unwilling to put Comet Lake and Ice Lake in the same graph, as this sends a confusing message.
With all this in mind, what does it mean? Intel seems unwilling to put Comet Lake and Ice Lake in the same graph because Comet Lake has some serious hardcore wins in ‘real world benchmarks’, and it isn’t until Intel introduces the accelerated workloads, built upon Ice Lake’s GPU or AVX-512 unit, or games, or connectivity, where Ice Lake can get a true win. But those are specific scenarios for specific individuals, which does go against the ethos of Intel’s march on ‘real world performance’.