The question you are asking is technically confusing. A deep plane facelift is a technique that has several variations, whereas SMAS (which is an abbreviation for Superficial MusculoAponeurotic System) is a term used to describe an anatomical structure, and is not a technique.Most modern day facelifts techniques are based on re-positioning (tightening) the SMAS layer. Not all deep plane techniques are the same, and I do believe some techniques are significantly better and more long lasting than others. The attached link provides more information and details.However, longer results are not only dependent on the technique. A patient's health and other treatments and procedures can be performed at the same time or later to enhance the results of the facelift or prolong youthful contours (e.g., laser resurfacing, fat transfer, skin care products, Ultherapy).I hope this helps.