No one seems to have realised the pressure in that type of situation can be double edged . Bob will be very well aware what some people will think if Nick wins the contest . If Nick deserves to win on merit, the pressure is actually on Bob to resist the temptation of placing Nick 2nd ( and bow to what could be an easy get out which will keep the doubters off his back ).
Knowing both exceedingly well ...Bob will never sway to family loyalty , nor to audience reaction. He is straight down the middle.......simply because his own integrity is paramount and simple.
If Nick deserves victory he will rightly get it, as he will have earned it . If not ...he wont... simple as that ...whats more if Bob feels Nicks band deserve last ...that is where they will be placed.
What is more ...Nick would do exactly the same and expect no less.
I know both exceedingly well and I assure any doubters , that whatever the result ..it will be an honest opinion . may not be yours , nor mine, ( but then again -we aint adjudicating ).
Remember -the performance & interpretation of music , is and always will be , subjective .
But give the adjudicators credit .as they cherish their own , well earned reputations and integrity above all else.