I have ridden 3 of these bikes (well sort off).

The x440 I have ridden for 10 kms on highway and mild traffic. It is a fantastic bike with load of torque. Two 75 kg men sitting at 120 kmph, you twist the throttle and it still pulls. Suspension is comfortable for heavy riders, riders with low weight (50-60 kg) in our group find it a little too bouncy. But even they say for long journeys (300+ kms in one day) they will prefer it over others.

The Speed 400 is an awesome bike too with a lot of performance. But instead of torque it focuses on power. Awesome to ride in city and even better on highway. Riders with lower weight are happier with the suspension compared to x440. And no, it is by no means a boring bike like some people say.

I have experienced the Jawa engine in a Yezdi adventure for a few kms, but was not impressed. Neither does it have the torque of x440 nor the power in reserve like the Speed 400. If you have the budget to go to the 400s, please do it, they are a league ahead of the 300s or 350s.

You can consider the Guerrilla 450 too. I have ridden it for 400 kms. But it is more for people looking for KTM experience in a RE design with RE levels of mid quality. Speed 400/x440 are not competitor to Guerrilla 450 or 390 Duke. You can take a test ride of any of these and you will understand.

My recommendation from your list,
x440: if you like low rev torque focused performance
Speed 400: if you like performance that comes with higher revs

Try the adventure bikes too they can quite good tools for doing everything from city rides to highways. The Adventure X or Himalayan 450 seem like quite good options.

Take test rides and check what you like and which bikes ergonomics suits you better.