In my experience, I have undergone both FUE and FUT hair transplant procedures. FUE was less invasive and left minimal scarring, but it was more expensive compared to FUT. FUT, on the other hand, had a quicker recovery time and was more cost-effective, but it did leave a linear scar at the donor site.
I have not personally tried DHI, but I have heard that it offers a more precise and quicker procedure with minimal scarring. However, it tends to be the most expensive option out of the three techniques. Ultimately, the best technique for you will depend on your budget, desired results, and tolerance for scarring. It's important to consult with a reputable hair transplant surgeon to discuss your options and find the best fit for your individual needs.