According to
Benchlife blog that broke the news on the clocks, the stock configuration here should have a 100MHz bump over the i9-13900KS on the E-cores and "P-core boost 2.0 frequency", but clamped to 125W thermal profile (which would effectively mean they can almost never reach those clocks anyway). The targets for the 13900KS are 6.0 TVB, 5.8 TBMT3, 5.6 P-boost 2.0, 4.3 E-boost
View attachment 314995
That and they're mass produced chips, the KS series are hand picked so it's likely most i9-13900KS chips are better than your average i9-14900K, and should have similar performance once power consumption's unlocked and any supposed overclocking done. 14900K's will release on October 17, so the first few reviews and benchmarks should be starting to surface very soon.
All in all this reminds me of the Core 2 Extreme QX9650 and the QX9770, except that this time you don't even get the 400 FSB support - anyone who got a 13900KS basically bought an early-access and potentially higher than average quality 14900K, and anyone who had a 13900K needs to lose absolutely no sleep over it, the only segment being offered something this round is the Core i7 one, I guess people who are still on Alder Lake chips should buy an i7-14700K as it'll be a healthy upgrade over the i9-12900K or 12900KS.