Hello, i want to compare this 3 ecu flashin tool...

Which is safer?

Which is useful?

Which is more comfortable?

I have kess since 2015 and i want something new... when i read ecu sometimes that read file is destroyed and cant open in tuning software :/ i used ECM Titanium... and i want to change tuning software too :D is VAGsuite better than ecm titanium? and another question :D VAGsuite is compatible only for diesel cars? Thanks :)