None. Most people (myself included) simply find it easier to cut out a meal or reduce portions vs burning it up doing cardio.
For me, recovery becomes a huge consideration when I do more than 5-6 sessions of cardio/conditioning a week. My legs hold water & feel "heavy", my weight training tends to suffer, and I just feel run down.
A combo of the 2 is ideal for me; I can keep cals up *some*, and moderate cardio doesn't burn me out physically.