Hi. I agree with the others. This is major surgical procedure regardless of terminology. That said, I understand that there are significant initial differences between a posterior approach used by "most" surgeons and the alternative direct anterior approach (DAA). I have not see this modified posterior approach that you reference or on the link from another post. As far as the DAA, you go to youtube to see it done. Dr. Joel Matta in California first popularized this approach. The DAA for HR is an approach that many use for a THA. I am scheduled to have my HR in May via a DAA. The presumed differences are (1) less soft-tissue injury as you do not go through the glutes, (2) less potential for a dislocation although HR offers a reduced likihood anyway, etc. It is often a more diffficult procedure for the surgeon - so mine tells me. As far as rehab, I am expected to be in the hospital for no more than 2 days. If it turns out, how much shorter can you expect with any approach?? Incision length - no expectations, but then again, I don't wear bikini's!
This is a discussion for you and your surgeon. My advise is to go with what your surgeon is most comfortable performing that provides the most predictable results in his / her hands. Best wishes....