Are these two expressions equal synonyms? Is there any difference in the usage/meaning? In the following example they are interchangeable:
Könnt ihr mir bitte behilflich sein?
Könnt ihr mir bitte helfen?
It seems to me that there is no difference but I’m not sure if it works like this also in different sentence structures and contexts.
I’ve already read this and this other topics that cover hilfreich, hilfsbereit, behelfen, verhelfen. There are so many words derived from helfen that I’m no more sure about anything.