Both are good.

1. Capacity: Large chicken heart cups usually have a larger capacity and are suitable for occasions where more drinks are needed. The small heart cup is suitable for smaller capacity needs, such as office or daily use.

2. Portability: Small chicken heart cups are usually lighter and easier to carry, suitable for putting in bags or pockets. Large chicken heart cups may be bulky and difficult to carry.

3. Material and thermal insulation performance: The material and thermal insulation performance of the cup are also important considerations.