This is education, not advice
The information here is written for the general reader and does not replace a personal surgical consultation. It cannot tell you how much of your abdominal wall is involved, whether your muscle is separated, or how your skin will heal.
No outcome is guaranteed
No operation can be guaranteed. How much the abdomen changes, how the scar settles and how quickly you recover vary between individuals, and a result is judged honestly only after the tissue has had months to settle.
Results are long-lasting, not permanent
Skin that is removed does not return and a muscle repair does not come apart on its own, but significant weight gain and a further pregnancy both change the abdomen afterwards, and ageing continues. A long-lasting change is not the same thing as a guarantee.
The risks are real for both
Fluid collection, healing problems, infection, bleeding and blood clots can follow either operation, and a full tummy tuck carries the larger share of them. Scars are permanent. A second operation is sometimes needed, and that possibility belongs in the decision rather than after it.