What's the difference in recovery time between a tummy tuck and a mini tummy tuck?

About half. The recovery time of a mini tummy tuck is about half the time of a full tummy tuck (time painkillers required, time to return to exercise, time for swelling to be gone).
Big difference. Wereas a full tummy tuck will generally treat all the skin and muscle laxity from the rib cage down to the pubic area lying between the vertical lines of the hip bones, the mini tummy tuck will typically treat only the loose slkin and muscles below the belly button. As you can imagine this generally means more of a recovery for the full tummy tuck patients but it also means greater results.
Substantial. A mini tummy tuck has a much shorter recovery because nothing is done to the abdominal muscles.
Big difference. A mini tummy tuck is skin and fat removal only, recovery is between 1-2 weeks. In a standard tummy tuck the muscle is repaired and recovery ranges between 2-3 weeks.
Not a Lot. The scar may be shorter and the pain may be somewhat less, but the bottom line is that you need 6 weeks for the tightening of the underlying muscles to heal before doing any heavy lifting or strenuous activity.
Less Recovery. The mini tummy tuck may be associated with less recovery, given the “less” work done on the abdominal wall muscles. However, several weeks of recovery are needed for both operations nevertheless. Keep in mind, that most patients who have had pregnancies and/or weight gain/loss do much better (from the outcome standpoint) with the full tummy tuck operation. Best wishes.
Usually 3-4 times. A full tummy tuck is usually 2-4 times the work of a mini, and the recovery time is longer. The restrictions after surgery are also more stringent for the same reason.