Which is better, the ASUS GM501 GTX 1070 laptop or the MSI gaming laptop?

Between the two, MSI would be a better option, but I would also urge you to check out the HP OMEN Laptop 15-ek0021tx once. The Omen series is the best in the industry. You can configure it all the way up to NVIDIA GeForce RTX 2070 Super Graphics. There are also display options with one going all the way to 300Hz with 300 Nits of brightness. The laptop costs around 1.43 Lakhs.
It comes with NVIDIA GeForce GTX 1650 graphics and 16 GB RAM. It has a large 15.6-inch fast display and long battery life. The gaming machine comes with OMEN Gaming Hub to make your experience even better. HP’s OMEN Tempest Cooling keeps the device cool while playing high-graphics intensive games.

If you’re still confused, then check the blogs on Tech4Growth section on DQIndia’s website or the NextGenIT on CiOL’s website.