What`s the difference between Arden Grange Premium and Performance?

Title says it all really. Daisy is back on Premium (plus bits of raw lamb in the morning) and I wondered what difference it would make to try Performance. She is skinny and always on the go. She has 2-3 hours excercise a day and she lives life at full speed.

I put Flynn on Performance as it claimed to release energy throughout the day and as Flynn is pretty much how you describe Daisy, I thought it would suit him better.

I didnt see any difference TBH so put him back on the Premium. I was worried it would make him more hyped but there seemed to be no difference in energy levels or general behaviour.