Intel Core i3 1305U 's Advantages
Integrated graphics card
Higher base frequency (1.6GHz vs 1.5GHz)
Lower TDP (12W vs 15W)
Intel Core Ultra 5 115U 's Advantages
Released 11 months late
Higher specification of memory (LPDDR5X-7467 vs DDR5-5200)
Larger memory bandwidth (120GB/s vs 76.8GB/s)
Newer PCIe version (4 vs 4.0)
More modern manufacturing process (7nm vs 10nm)