There is a trade-off between the three kinds of improvements. It is possible to pick some points (for example) that give a less than maximum power reduction as

There is a trade-off between the three kinds of improvements. It is possible to pick some points (for example) that give a less than maximum power reduction as well as a less than maximum speed improvment. I think the comparison would be the Apple Silicon that they released is larger than a (hypothetical) alternative that only improved performance but kept the other two constant.