These are two different cashback methods. Which one is more suitable depends on your spending habits and personal preferences. The following are their respective characteristics and considerations:

Didi Cashback Credit Card:

1. Suitable for users who frequently use Didi Travel. If you frequently use Didi taxis in your daily life, you can get more cashback offers by choosing a Didi cashback credit card.

2. The cashback ratio is relatively high. Didi cashback credit cards usually provide high cashback ratios for Didi taxi purchases. For example, you can enjoy a certain percentage of cashback for each purchase.

Douyin cash back credit card:

1. Suitable for users who often shop on Douyin. If you often purchase goods on Douyin, you can get more cashback offers by choosing a Douyin cashback credit card.

2. The cashback ratio varies depending on the specific bank and credit card. Different Douyin cashback credit cards may provide different cashback ratios. For specific ratios, you need to check the regulations of each credit card. To sum up, if you use Didi more for travel, it will be more suitable to choose Didi cashback credit card; if you often shop on Douyin, it may be more cost-effective to choose Douyin cashback credit card.