If I were you, I will away from both these watches. Just Because both of them has powermatic 80 movements.

Yes they have more power reserve, and more accuracy. But
Powermatic movements does not have balance wheel regulating pins. And need special tools to regulate.
So servicing can be only done from the agent.
And Tissot gentleman has powermatic silicium movement. That means it has silicon parts in the movement.
Not sure about long term durability of these parts. Specially in Sri Lankan hot climate.
I'll recommended something with ETA 2824. Or selita sw200 or other. They are time proven workhorses in Swiss watches.
Plus they have a more smoother second hand sweep. While powermatic has a a lower beat rate so second hand has a visible judder. Not a big deal. But if you see it, You can't unsee it.