JOHNSOND61

Does it matter what size power steering tank is used? I want to change out the factory tank to relocate and get something that will look cleaner for my 2000 WS6, just wondering if there is any harm in doing so or whether it needs to hold a certain amount of fluid. Looking at the ones below. Thanks

http://www.jegs.com/i/Moroso/710/63788/10002/-1
http://www.jegs.com/i/Moroso/710/63506/10002/-1