i5-9400H + RTX 2060 vs i7-9750H + GTX 1660Ti

Aeacus

Titan
Ambassador
For gaming: 1st one, with 9400H and RTX 2060. 2nd one is better suited for production work since 9750H has Hyperthreading.

Build comparison as well, 1st one as a base, 2nd one as an alternative:
Userbenchmark PC Build Comparison

Baseline Bench: Game 95%, Desk 80%, Work 55%
CPU: Intel Core i5-9400
GPU: Nvidia RTX 2060-6GB
SSD: Samsung 860 Evo 500GB
RAM: Corsair CMW16GX4M2A2666C16 2x8GB

Alternative Bench: Game 73%, Desk 75%, Work 57%
CPU: Intel Core i7-9750H
GPU: Nvidia GeForce GTX 1660 Ti
SSD: Samsung 860 Evo 500GB
RAM: Corsair CMW16GX4M2A2666C16 2x8GB