A Thank you for your question. This is actually a challenging one to answer because aesthetic surgeons use very different techniques under the vague name of "mini" facelift.
I am glad to see you included the SMAS in your question which means you have been doing research but the SMAS can also be manipulated in many ways to yield different results.
The term "mini" to me is a marketing word. It makes the procedure sound less invasive or less scary. A facelift is necessary when structural changes have caused a break in the jawline, deepening of the marionette lines and laxity of the skin of the neck. How much you lift and how much skin you remove varies but manipulation of the SMAS is critical yield the best and longest lasting results.
Volume may also need to be added in the form or fat in surgery or fillers in the office to restore the youthful volume of the face. Skin resurfacing may also help in completing the rejuvenation.
My point is that if you manipulate those structures properly the duration of the effect should be the same whether it is a minimal correction or a more significant one. 5-10 years is reasonable to expect.
Seek out a board certified plastic surgeon to evaluate you and discuss their technique and expectations for duration of their results.
Good luck and I hope this was helpful