Well it comes to personal preference. But samsung keyboard is not terrible. Here are some features which I like more in samsung keyboard.
1. When you go to number screen the special characters below numbers appear in same sequence as if you have pressed shift key and number key on laptop or computer. It comes handy when you use number and corresponding special number in password. For example in password 2020_@)@) last 4 char are easy to remember. You dont have to remembrr special char.
2. You can swipe on spacebar to change language.
3. In password field character preview is disabled for security.