From what I know in my time here with Citi, mostly it's the status/prestige, the team of staff supporting you tgt with your RM, and the lounge access in my opinion. There are some specific benefits like free global transfers, lifestyle events, investment seminars etc, which cater to a more niche clientele. The new Citi Wealth Hub has received quite positive feedback since its opening in Dec, so I guess that is an extra perk if you'd like to bring your family to chill while shopping along Orchard.
If you're a new to bank client and you deposit $250k within the first 3 months, then you can qualify for their welcome promo too:
- $300 base reward, and
- $300 additional online reward, and
- $300 additional reward for new/existing credit cardholders
Of course they will reward you much more for investing/insuring, but even without doing so, the above is what you get for just depositing fresh funds.
Their service chargers is also the higher if you happen to but product thru them. In fact is the highest.