I think you're looking at it from the wrong angle. You know what your needs are, gaming at 1440p 144hz. So then you plan a build for that using AMD, and one using Intel. Then see which one costs less. That's the one you build.
How much faster or slower one CPU is over another is irrelevant. If you can build the system you need with an AMD CPU for less, why would you care if the equivalent Intel CPU was X% faster? What difference does that make?