Tom's Hardware - This chart sums up the situation with Core i9-10850K nicely: The stock Core i9-10850K and Core i9-10900K offer the same performance when calculated as an overall measure (geometric mean)
Intel Core i9-10850K 3.6 GHz Desktop CPU Processor - Newegg.com
Intel Core i9-10850K CPU Review: Cheaper, but Nearly Identical Gaming to 10900K | Tom's Hardware
Intel Core i9-10850K Unlocked Desktop Processor - 10 cores and 20 threads - Up to 5.20 GHz Turbo speed - 20MB Intel Smart Cache - Socket FCLGA1200 - antonline.com
Intel Core i9-10850K edges closer to a shipping product, could be priced to tackle AMD's Ryzen 9 3900X - NotebookCheck.net News
Intel Core i9-10850K 10x 3.60GHz Comet Lake (CM8070104608302) - pckaufen.shop