For each scenario, there are advantages, and there are disadvantages

Delhi
Pro:
S
Home improvement at casa del DefCol
Wittens
Photography
Two bowed bookshelves
Export seconds markets
Motorcycles
Freelancing friends
Indian journalism
Jasmine incense
Employment

Con:
Heat and dust (thanks, Ms. Prawer Jhabvala)
Bureaucracy
S's traveling assignments
Conservatism
Autorickshaws
Bathing in a bucket
Cultural confusion
Outsider status

U.S.
Pro:
Family
Showers
Stoves that don't depend on black-market gas cylinders
Diversity
Ease of navigation
Libraries
Cynicism
Potable water
Temperate
Reality TV
The New Yorker

Con:
Cost of living
No good Indian food
Bad memories
Regret
Bars
S illegal