Part of the stress in US is because of the different side driving, but also a lot because I have to keep in mind a TON of rules - lane markers, speed limits, lane changing etc.- and everyone moves in super high speed so any mistake can be fatal.
In India, on the other hand I just need to take care of the signals and otherwise wherever my car can fit, I am good to go. If my car rubs a bit against another car or a small bump here and there - no big deal. Driving in the night though is stressful in India also and I avoid it.