I agree with the above. Jkurz and I had a bit of a difference when I first came on this board, he misstated something...I did not know him and called him on it. He refused to back down.....but that is dead.
He has a sledgehammer way of posting sometimes, that must be "read" to understand between the lines.
Now, in essence, a calorie is a calorie. The difference lies in what is terned as "clean" and "dirty". Typically, dirty has more calories, due to processing, etc. This is why and only why when folks change to a "clean" diet, they lose weight. They trade in calorie dense foods for less calorie dense foods, thus create a caloric deficit.
Now, when dieting for bodyfat loss, you can still lose bodyfat eating carbs, as long as you are under your maintenance needs. There is noone who can't do this.
At some point trying to get abs showing, and retain lean mass, macros will have to change though. While on the one hand, a high fiber, low fat diet does work, it has inherent problems as to retaining lbm. Hormones at some point come into play. Typically, bodybuilders' solution is to throw more protein at the muscles in hopes of retaining more.
Unfortunately, breakdown of muscle protein is as much hormonally controlled by low insulin, lowered testosterone, uptick in cortisol, as it is by the availablity of nutrients(protein).
So, it would make sense to work to keep test levels as high as possible. This is where a higher fat intake can be very beneficial. Research shows, Hamalinen et al, reported that men fed a low fat diet(less than 25%), high fiber for 6 weeks experienced a significant drop in test and free test.
Test was shown to uptick dramatically to baseline when these same folks were given a moderate fat diet(37%).
So as you can see, macro ratios do well make a difference when dieting, in fact a huge difference. If test levels fall off, no amount of protein can counteract the hormonal change.
Ironically, PUF do not exert these benefits, in fact the opposite. Monosaturated and saturated fats on the other hand exert a huge impact on test.
What I am saying here for the average healthy bodybuilder with no cholesterol issues(and it is shown if you have no beginning issues, dietary cholesterol will not hurt you), then it may well be wise to add these fats to your diet, especially as drop calories.
I am a huge fan and research seems to bear me out that an optimal cutting diet is 50/20/30, p/c/f, and maybe if trying to get very lean go even to 50/10/40. As long as you are under maintenance, this macro ratio will work fine and save more lbm. and you will shed fat.