The AMD RX 9060 XT 16 GB wins in 10 out of 13 comparable specs. Its biggest advantage is FP16 Performance (372% better).
GTX 1660 Ti wins in 3 specs (Memory Bus: 50% better).
Recommendation
Choose RX 9060 XT 16 GB if you want the best overall performance — especially fp16 performance.
Choose GTX 1660 Ti if memory bus matters more to you.
