Mitochondria:
1. The mitochondria is an organelle that has a double membrane.
2. Found in all eukaryotes.
3. Pigments are absent. So, they are colorless.
4. Folds are present in the inner membrane.
Plastid:
1. A plastid is an organelle with a double membrane.
2. Found in plant cells and algae only.
3. It has different pigments. They are colorful.
4. No folds in the inner membrane.