For interest sake, here are the two sides from Round 18 last year.
Waratahs: Kurtley Beale, Lachie Turner, Ryan Cross, Tom Carter, Atieli Pakalani, Daniel Halangahu, Luke Burgess, Dave Dennis, Phil Waugh (captain), Dean Mumm, Sitaleki Timani, Pat O’Connor, Al Baxter, Tatafu Polota-Nau, Benn Robinson.
Reserves: John Ulugia, Jeremy Tilse, Dan Vickerman, Chris Alcock, Hugh Perrett, Josh Holmes, Sosene Anesi.
Brumbies: Christian Lealiifano, Henry Speight, Tyrone Smith, Pat McCabe, Adam Ashley-Cooper, Matt Giteau (captain), Patrick Phibbs, Ita Vaea, Julian Salvi, Mitchell Chapman, Peter Kimlin, Ben Hand, Ben Alexander, Stephen Moore, Jerry Yanuyanutawa.
Reserves: Anthony Hegarty, Jono Owen, Henry Vanderglas, Tom Boidin, Josh Valentine, Andrew Smith, Robbie Coleman.
From that 22, the Tahs have 6 players in the starting XV and a total of 9 in the 22 this Saturday.
The Brumbies have 5 players in the starting XV and a total of 10 in the 22 this Saturday.
What does that tell us? Not much.