Braces differ in the material they're made of, which gives them different physical and visual qualities. On this basis, we can distinguish between metal braces and aesthetic braces (ceramic and sapphire).
Depending on how they hold the archwire, braces can be conventional (with elastic ties) or self-ligating (with a small built-in clip).
Depending on which side of the tooth they're bonded to, braces are either labial, placed on the side facing the lips, or lingual, bonded on the tongue side.
Metal braces are the most visible when they're on the front of the teeth, because they're grey. Metal is a smooth, polished material, which helps the archwire slide more easily through the brackets and leads to faster tooth movement. Ceramic braces are a translucent white, which makes them much less noticeable in the mouth. Their surface isn't as smooth as metal, so there's more friction on the archwire as the teeth move, which slows the process down. The same applies to sapphire braces, which are transparent and the most aesthetic option, even compared with ceramic ones.
If appearance matters to you, you can choose ceramic, sapphire or lingual braces, or clear aligners.
If speed of treatment is your priority, go for metal braces – conventional or self-ligating.
This answer is for general information. Your own case needs an examination by an orthodontist.