Intel Core i9 9900X 's Advantages
Larger memory bandwidth (85GB/s vs 41.6GB/s)
Higher base frequency (3.5GHz vs 2.0GHz)
Larger L3 cache size (20MB vs 12MB)
Intel Core i7 9700T 's Advantages
Released 6 months late
Integrated graphics card
Lower TDP (35W vs 165W)