The most obvious choice for comparison is a pros and cons list. The pros are that you get to know the diverse cultures of the stranger, their heritage, their hobbies, and even the things they like! The cons are that you're literally talking to a stranger.
The circumstances in today's world causes suspicion amongst many people, especially about age, gender, and looks. But ask about these few things beforehand. Sharing personal details too soon or for wrong reasons can be dangerous. Now let's see how it applies to dating and which dating sites we can use.