I need comments from you all, how we can provide a solid answer at an interview that we can do this job better to others?

you can say "My other friends may have better background but I've got some abilities which can compensate that easily.
I'm madly devoted to my work, when I do, i do it from my heart and i do it to make it perfect.
this makes my work differentiated and the best one can do"

Say, I know I can do this job better at my best with support of my past experience and knowledge I gained though...but I don't want to compare with others or else I cant say what others lagging...;as I believe everyone with good approach and hard working can be able to do the work BETTER..isn't?