This thread might as well be Kamui vs. Hiraishin, because ultimately, nothing else will matter.
We do know that Minato has escaped Kamui before. Thing is, he escaped 14 year old Obito's, whose adult version's Kamui was outsped by Kakashi's Kamui. Furthermore, we have Kakashi interrupting Gedo Mazo's teleportation mid summon, tearing off an entire arm (which is easily about a hundred times the size of a human). Kakashi's Kamui can interrupt teleportation, so it boils down to whether or not he can react on time / whether or not Minato can react on time, and if either fighter opts for techniques other than their respective space time jutsu.
I'm not going to give an opinion here because I don't really have one. There is a good case to be made for either side. However, the "Hiraishin > Kamui" is irrelevant because we are talking about a completely different user, and a completely different version of Kamui.