Traditional braces make use of metal wires to move the position of your teeth while Invisalign uses a series of clear plastic trays to help move your teeth into proper position. Both Traditional braces and Invisalign are great at correcting issues caused by crooked teeth.
Traditional dental braces will use use a system of metal brackets and wires that, when properly used, can properly align and straighten your teeth. Even the most difficult and complicated issues for tooth alignment can be corrected using traditional metal braces. 
Invisalign uses clear, plastic trays that are worn 24 hours a day with normal changes in the tray every two weeks. X-rays, pictures and impressions are use to create a precise 3-D image of your teeth to configure your aligner trays. The bi weekly changes have minor adjustments that slowly move your teeth into position. Since these trays are clear plastic, they are almost invisible when worn. Most people with more complex dental issues still prefer to use traditional dental braces. Your Orthodontist will be able to offer you the best option for your specific needs.
So are traditional braces better then invisalign? It really comes down to deciding what the specific need is. Depending on what each individual patient needs is the best way to determine the best option. Certain issues with your back teeth, or the need to rotate teeth or move them vertically can make Traditional braces your only option. Your Orthodontist will recommend the most effective solution to perfect your smile.