They have everything in common from actively avoiding military service to being pro-big government.
In my opionion, Newt is a genuine conservative. Unlike Mitt, he’s not afraid to say it and espouse it. He’s veered off the reservation on occasions but is still at heart a solid Goldwaterite, while Mitt, like his father, would be more like Nixon and Rockefeller than Reagan and Goldwater.
As president, Newt would tear the executive establishment asunder. I can see him actually going to the various bureaucratic offices and asking people “what is it you do here? And does this need to be done?” That’s his strength. I think he would streamline things down as he did when he took over the House.