Compare Stored Procedures in 2 SQL Server databases

Using the following script it is possible to get an idea if the stored procedures in two databases are equal.

SELECT A.ROUTINE_NAME, A.ROUTINE_DEFINITION, B.ROUTINE_DEFINITION
FROM sourcedatabase.INFORMATION_SCHEMA.ROUTINES A
LEFT JOIN targetdatabase.INFORMATION_SCHEMA.ROUTINES B ON A.SPECIFIC_NAME = B.SPECIFIC_NAME
WHERE RTRIM(LTRIM(SUBSTRING(A.ROUTINE_DEFINITION,CHARINDEX('CREATE',A.ROUTINE_DEFINITION),999))) <> RTRIM(LTRIM((SUBSTRING(B.ROUTINE_DEFINITION,CHARINDEX('CREATE',B.ROUTINE_DEFINITION,0),999))))
ORDER BY ROUTINE_NAME

Even if the routines have the same functionality, they may have some slight differences, like spaces in front of the CREATE PROCEDURE statement and also trailing spaces at the bottom. I have tried to remedy this by trimming and also comparing substrings where initial spaces have been removed. Still room for more improvement, I’m sure, but just a small idea.