Do you travel on business? If not, I would suggest the Zync card
. reason is you would get better rewards, you would be able to choose a variety of gift cards from the membership rewards program. you would also be able to redeem miles on certain airlines.
To give you an example, I have the green card I don't travel on business so I don't have a Starwood Preferred guest card. My friend an accountant, he travels a little bit and he has that card.
If you get the Delta you can only redeem miles on Delta. So if you do travel quite a bit checking into hotels, entertaining clients at restaurants, taking customers out to ball games and Broadway shows then the Delta card would be a great card.
How many times when standing in line at stores like J Crew, Macys, Ann Taylor, The Body Shop etc. have you seen anybody using a Delta gold American Express card?
I only saw 1 person it was at Walmart.
what I'm trying to say is the zync would be a great choice if you don't travel. If you do travel the Delta gold would be a great choice.