Delphi function comparing content of two TStream?

I need to compare if two TStream descendant have the same content. The only interesting result for me is the boolean Yes / No.

I'm going to code a simple loop checking byte after byte the streams content's.

But I'm curious to know if there is an already existing function. I haven't found any inside DelphiXE or JCL/JVCL libs.

Of course, the two streams have the same size !