Codecomparison software

Hi.

I wonder what you are using to compare kayako-code between versions.
Right now I am using code compare (the free version) https://www.devart.com/codecompare/
and I have been using winmerge before.
But It seems that they sometimes miss codechanges, for example between versions or modified code.

I need tips on a good one that I can "trust".

Thanks in advance.