I'd say it's about the maximum capacity a team has and the extent to which they play to it.

I would define 'capacity' as depth of talent and the ability to respond and adapt to the circumstances that prevail.

Leeds have more talent and more ability to respond and adapt and therefore their maximum capacity is greater than ours.

In the first half we played to our maximum capacity. Leeds didn't

In the second half they played at or close to their capacity and so did we.