Yes, trying to debate this type of subject is so impossible but sometimes fun and informative lol Since we all use the stuff under different conditions and purpose comparisons are tough. Its not like we are a bunch of scientist doing controlled experiments and arriving at conclusions that are definite! I and a friend did a couple dipping sessions with "Minwax" dip, one was on a old 15mm American Civil War army the other was on some 28mm Russians from turn of the century. The ACW troops turned out fine, the 28mm way two dark and the dip did not suck into the crevasses very well but splotched over the whole surface a bit? What was the difference? Air temp? Humidity? Age of product? What paint was used on the minis being dipped? were they coated with a clear? Matt? was that coating water based or Lacquer based? Lots of Variables! When you take this type of stuff into consideration and the compound it by spreading ti among half a dozen people on different continents using different process and even brands no wonder there are different results... o_o but we all learn in exchanging the thoughts and experiences we have.
I mentioned the cost of army painter since I was one of those who for a long time THOUGHT it was overpriced and bad mouthed it. Then I decided to try it and be fair (I had seen some pretty nice results on others army's) before I continued bashing it, I was so surprised I bought a second shade. (I have light and Medium)
I too do not consider dipping as the last step on many project but I would say that once "dipped" the painting process becomes different with paint, and the paint process changing because the dip forms a coating on the surface that affect the way following paint layers and or washes lay down.
The biggest problem I have nowadays is remembering the process and materials I used to create a look ten months later ??? One of the best things I ever did was start a painting log, just a note book where I write down the paints used, the process and order followed to do the mini or army. Its great when 2 years later you get back into a period and want to do some more matching troops but don't remember exactly what you did for the first ones! I just have to remember to open the book and write it! >:(
(http://www.historicalhobbies.com/images/HHjpgs/ArabD1.jpg)