Both siphon jet and gravity flush toilets have advantages and drawbacks, so it is largely a matter of personal preference and what type works best for your home.
Gravity flush toilets are more affordable as they use less water per flush than siphon jet toilets. However, water can splash out of the bowl if they are not properly sealed around the rim, and they are not ideal for larger bathrooms.
Siphon jet toilets usually provide a more powerful flush and are less likely to clog than gravity flush toilets. This is why they are often used in commercial and public bathrooms.