Okay DON"T tell me which one is better for what reason and why you think the other kind sucks- what I am asking is what is the actual DIFFERENCE in the two ??? You guys are all set on what you prefer---but mechanically WHAT is the difference? I know IFS stands for independent "front"?? Suspension- but what does that mean? sorry for the ignorance! thanks guys! Brandy LOVING the new Duramax!!!