と違って => different to N2
Compare
に相違ない => without a doubt; certain; sure N2
に[相違「そうい」]ない => No doubt N2
Information, Report
[事「こと」]だ => A is necessary/good (offering advice/suggestion) N3
Needs, Requirement
に[違「ちが」]いない => Without a doubt, A N2
Information, Report
事と次第によって => Depending on the progress of the situation N2
How to say the beginning
~ といっても間違いない => although I say; although one might say ~ it doesn't matter ... N1
Explain
[事「こと」]ができる => Be able to A; can do A, Can A; be possible to A; N4
Causative, Passive, Volitional
に[限「かぎ」]った[事「こと」]ではない => It's not limited to A, it's not only A N1
Degree/ Level/Amount