Both models
i9-10980XE and
i9-10900X are based on
Cascade Lake architecture.
Cascade Lake is a architecture focused on high-end CPUs that uses the 14nm process. There are i9 and Xeon models using 4 different cores: Cascade Lake-SP and Cascade Lake-AP for servers, Cascade Lake-W for workstations and Cascade Lake-X for home high-end Pcs.
Using the multithread performance as a reference, the i9-10980XE gets a score of
1241.1 k points while the i9-10900X gets
632.4 k points.
Summarizing, the
i9-10980XE is
2 times faster than the
i9-10900X. To get a proper comparison between both models, take a look to the data shown below.