I enjoyed reading this thread, thanks for posting. I would say the only way to objectively determine who is "most valuable" is to look at the paychecks. But I must agree with the other sentiments already posted that take a more more philosophical standpoint and state that both are equally valuable.

My goal is to be as well-rounded as I can in both fields. I think someone who is pretty good at both is doubly "valuable". The downside is that it is probably near impossible to obtain "expert" status in both worlds simultaneously with this approach.

And don't forget that raw skills alone don't make someone valuable. A good dose of likability and social intelligence will carry you far to whatever your goals are.

$PM = "Perl Monk's";
$MCF = "Most Clueless Friar;
$nysus = $PM . $MCF;