Some of the SJs in my family (ISTJ, ESTJ) love to research and debate the hell out of things, but it's generally to confirm their beliefs or the established way of doing things. In other words, they'll uncover fact after fact to support their argument, but are not inclined to take new or contrary opinions into consideration. (Although the ESTJ is more likely to do so than the ISTJ.)
As opposed to me, who is open to other ideas and possibilities, so I will consider both the new and the old with equal weight. I think in this way I am more intellectually curious, while their command of extraverted thinking may make them appear more intellectual, not to mention enable them to succeed more adroitly in the traditional 'intellectual' pursuits.