Had a similar decision in Bangalore when I was there and ultimately went with the Marriott mostly because of the lounge and the extended dining-options at the hotel. As I needed a few more SPG-nights I also booked a room at the Aloft as it is in walking distance from the Marriott, and as Keyser said it was OK, but nothing to write home about and certainly not the place where I would want to stay for a week - the room was much smaller than the Marriott room and just felt a lot less welcoming than the Marriott's (and also was too dark for my taste). I have no own experience with the Four Points, but it looked approximately halfway between Marriott and Aloft from the pictures.

Hope this helps!

Greetings - Dirk