Both Hotels are different.
GH, nice club but not on the beach, suites are nice and in my experience good elite recognition.
Nusa Dua is not every ones place as some say too sterile but its beach is nice and you can get out and about. I liked the GH and i consider it good value.
The interconti is very nice. excellent club and suites are amazing. you can enjoy your club cocktails on the beach and by the club pool. club guests get to take breakfast where every they want and receive free airport pick up.
jimbaren is a good location and very close to the airport. just out of the hotel and turn left you have a huge selection of seafood restaurants on the beach.
The IC is more expensive but the perks of the club are more extensive.
i have not stayed in standard rooms at the IC so i can not tell you what there like but i personally would only stay in either in a club category room, its worth the extra $s.
enjoy Bali, i can not wait to rerun in the summer. i will stay a week at both hotels.