Sapphire, Painless, Perkutan and Manual technique are all sub-methods of FUE technique, and has no differency in terms of implementation and result. Those are terms used only for marketing. They do not have any advantages or disadvantages over each other.
DHI is another technique used for hair transplants, and may be a good choice for hair transplants which involve less than 2500 grafts. However, it is better to choose the FUE technique if the number of the grafts planned to be planted is more than 2500.
You have the option to have both FUE and DHI hair transplant at Clinicexpert.