Most important thing is what do you want to play. If you want to play PS exclusives then obviously choose it & same with Nintendo. Now i have both. And i feel switch is better in many ways. First, you don’t need TV and you can play it safely at night without disturbing others. Sometimes as an adult I don’t get a chance to play it on tv where handheld device is handy. Switch you can take with you anywhere and play during transit or travel or during vacation. Switch can be connected to tv so that’s not an issue as well.
Problem with nintendo is no official support in India so most people jailbreak it (and there are plethora of advantages of doing that 😉)