Intel Core i9 12900T 's Advantages
Integrated graphics card
Newer PCIe version (5 vs 4)
Larger L3 cache size (30MB vs 12MB)
Intel Core Ultra 5 135UL 's Advantages
Released 2 years and 3 months late
Higher specification of memory (5600 vs 4800)
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Higher base frequency (1.6GHz vs 1.4GHz)
More modern manufacturing process (7nm vs 10nm)
Lower TDP (15W vs 35W)