Both versions offer an equal likeness to the reference, so from a technical standpoint they are tied. As far as which one is "better" depends on the viewer's preference of style. The pen version is crisp and sharp, giving the portrait a certain seriousness and intensity. The pencil version shows a more sensitive side, or a more "vintage" or "old-timey" kind of vibe, if that makes sense(?). Personally, I like both 🙂