The Citi Simplicity card is great for balance transfers and purchase financing.

• 0% Intro APR on Balance Transfers and Purchases for 21 months. After that, the variable APR will be 13.24% - 23.24% based on your creditworthiness.
• There is a balance transfer fee of either $5 or 3% of the amount of each transfer, whichever is greater.
• No late fees, no penalty rate, and no annual fee.

I like the no fees part myself ... well, except the balance transfer fee.

Good question! Highlights of the Chase Slate Card are fairly comparable:

• $0 Introductory balance transfer fee for transfers made during the first 60 days
• 0% Introductory APR for 15 months on purchases and balance transfers, then 13.25% to 23.24% Variable APR*
• Free Monthly FICO® Score and Credit Dashboard
• No Penalty APR - Paying late won't raise your interest rate (APR).

So the big benefit is no balance transfer fee. The flip side is the intro APR offer is good for 15 months - versus 21 months with Citi Simplicity.

Another advantage of Chase Slate is the "Blueprint" tool. As a reminder, Blueprint allows you to customize your payments to avoid interest and track spending. It helps to keep you on track and avoid incurring any interest charges after the promo period is over.

All than being said, 21 months is 40% longer than the promo period offered by Chase. Hard to pass that up.