Is there any documentation available that compares Firebird to MS SQL
Server. I have numberous potential clients that do not wish to move
from MS SQL because they already know of it. And I cannot provide them
anything other than old InterBase documents that compare that version of
InterBase with the then current version of MS SQL Server.

If there are not some available, who (in the know) could create such
documents? I do not possess enough knowledge of database systems to
create something that would compel someone to move toward Firebird and
be satisfied that it was stable, secure, etc.

Can someone point me the right direction and/or at what I should do?

Thanks.