We have discussed space travel and time travel and will now consider experience. We experience an empirically discerned spatiotemporal realm. The subject and objects of experience are both spatially differentiated and temporally enduring. If there were neither space nor time, then experience would shrink to an instantaneous point, i.e., would cease to exist. I think that experience is necessarily spatiotemporal and therefore that timeless consciousness is as impossible as a sideless square. Can there be transtemporal consciousness that would incorporate time just as three-dimensional space incorporates planes? I don't know.
If a fictional character has qualitatively different sensory experiences and/or thought processes, then how does the auther convey these qualitative differences to his readers? Poul Anderson describes the heightened sensations of werewolves, merpeople and Ythrians in flight. I was reminded of this by reading Elliot S. Maggin's accounts of Superman's ability to perceive the entire electromagnetic spectrum and of Lex Luthor's ability routinely to think his way out of any high security confinement.