Is there a difference between clear or coloured braces other than the look?

Yes: They are made of either plastic or ceramic material instead of metal. They tend to either stain more easily, are bulkier (for strength) or they can be somewhat difficult to remove. I personally (as an orthodontist) do not like them. Almost always the wires will be a metal alloy, so truly no one will be "fooled" that you are not wearing braces. All life has compromises. Good luck!

No: Depends of the definition you have for clear or colored braces. Clear braces may mean clear aligners like invisalign. There are ceramic brackets that are used that seem to take on the shade of the patient's tooth color. Colored braces may be the type of metal grey brackets commonly used in braces.

Yes: For a number of design and material reasons, it takes slightly longer to treat with clear braces, perhaps 10%. They are also slightly more difficult to remove.

Not really: There are differences between metal (colored) braces and clear (crystalline) brackets; however, none that would effect your treatment. Clear braces are selected because of esthetics.

Yes: Clear braces are created from a composite while what you call colored braces are metal with colored rubber bands holding the wire. The different materials can take different forces and so, while very similar in what the orthodontist can do with them, they are not the same. Typically the clear take longer and may not alwasy be an option because they can not take the same forces.