I do not get what you talking about. IPC? Zen 2 (Ryzen 3000 & TR 3000) have higher IPC than Intel. Nobody disputes that except the blind.
Now by how much depends. Comparing CPUs at 3500Mhz lock, around 8%, at 4000Mhz the gap widens to 10%.
https://www.techspot.com/article/1876-4ghz-ryzen-3rd-gen-vs-core-i9/
https://www.guru3d.com/articles_pages/amd_ryzen_7_3800x_review,9.html
If left to boost on their maximum settings
https://www.guru3d.com/articles_pages/amd_ryzen_7_3800x_review,10.html
So clearly Zen 2 has higher IPC than CoffeeLake based CPUs.
Now going to HEDT things are worse for Intel as
@humbug said above. The new 10000XE series is just a renamed Skylake-X so flat out worst case scenario (3.5Ghz cap) the Zen 2 CPUs would have 10% higher IPC.
As for multi threading it all depends.
In HEDT platform, Intel uses MESH topology not RING since the Skylake-X came out (June 2017). Mesh is tad different than IF but the idea is the same. It allows better scaling on multi core CPUs for productivity but it's performance on games is appalling as proven numerous times and only suitable for monolithic CPUs. It doesn't scale with chiplets or multi-socket system (severs). Contrary to Infinity Fabric is which by miles superior operating within the same CCD, on various CCDs of a CPU and over multiple CPUs, all the same.
The mainstream Intel platform has managed to hold 2 1/2 years of AMD siege because of the Ring topology, but that has limitations. For sync-lock Ring & Core speed the CPU cannot be higher than 4 core. That's why 7700K & 7740K were exceptionally good CPUs for gaming (and the last ones) because of that sync-lock. Anything with more than 4 cores (6-8-10) must have Ring uncoupled to core otherwise instability and crashes occur.
Also Ring cannot go higher than 10 core CPU. After that the perf hit is so severe that ain't worth over Mesh or IF like topology.
And is one of the reasons why Intel cannot make a mainstream 10 core CPU let alone a 12 core or 16 core currently. That is why is also stuck atm as it won't have new architecture well until into 2022.
The 10nm CPUs if using Ring would be capped at 8-10 core, as it cannot go higher. And introducing Mesh on mainstream means it would be losing to AMD flat out even on gaming.
So basically Intel is sandbagging as much as possible atm behind the 5Ghz barrier and the archaic Ring topology, until they have a brand new ground up architecture, which is expected 2021-2022 the earliest.
Which by that time we are on Zen 5.