cows milk also has pretty much the same calories, but more protein. that's a good thing whether you're trying to lose weight (protein is filling) or build muscle (protein helps build muscle).
...
the numbers.
| per 100ml | oat (semi) | cows (semi-skimmed) |
|---|
| calories | 46 | 50 |
| protein | 1g | 3.6g |
| carbs | 6.6g | 4.8g |
| fat | 1.5g | 1.8g |