Can aeroshell 33ms be used instead of aeroshell 33?

Answer The Shell website says that it is fully compatible with Aeroshell 33. However, note this statement:

"AeroShell Grease 33MS is a direct alternative to AeroShell Grease 17, but when changing from (clay-based) ASG 17 to (Li-complex based) ASG 33MS, the normal rules on grease changing should be applied." Link: http://www.shell.com/home/content/aviation-en/aeroshell_site/33ms/grease_33ms.html