Fat vs Sugar (Healthy Eating Argument)

[burkoboy]

Ok, so I'm going through the grocery tonight, looking for "fat free" stuff, specifically "no salt added" veggies etc. I guess the easiest way to phrase this question is this:

Let's say I want to cook this for dinner:
1) Salad with Italian Dressing
2) Pasta, Chicken Breast w/ pasta sauce

Now, salad is easy, so is pasta and chicken...but something caught my eye when picking out the dressing and the pasta sauce. Both of them came in fat free versions, but both fat free versions had significantly more sugar then the non fat free

And obviously, the fat free versions had significantly lower fat then the regular version

So my question is, what is ACTUALLY better? The fat free stuff, the regular stuff, or say, do the fat free dressing, and regular pasta, or vice versa?

Or is this too difficult to answer because it depends on type of food/time of day its eaten/etc?