That's why I quoted 7nm. I'm aware of the process differences and Intel's severe and continuing problems with their 10nm process.
My point being that if you want to compare a state-of-the-art ARM CPU, you should compare it to a state-of-the-art x86 CPU and Intel's CPU's are simply not state-of-the-art at the moment.
To the degree that they're not state of the art (and I think you're overselling that, Intel does pretty well core for core), it's not at all because of 7nm TSMC vs 14nm Intel.
Intel would be doing just fine with a 14nm Ice Lake.
My point being that if you want to compare a state-of-the-art ARM CPU, you should compare it to a state-of-the-art x86 CPU and Intel's CPU's are simply not state-of-the-art at the moment.