I am flying often AMS-BRU and vv with KLM and I was wondering how they use their aircraft on this connection. After each AMS-BRU there is a BRU-AMS with the same aircraft type between 30 and 40 minutes later. I guess this is the same aircraft. The aircraft used on the last AMS-BRU of the day is staying in BRU for the night and leaving to AMS the next morning as the first BRU-AMS. Is this always the case or do they have spare aircraft in BRU?

And what happens to the aircraft that arrive in AMS? They are not leaving immediately back to BRU, so are they used for other connections then?