I did just read someone explaining that they for a lot of the cats with shorter hair (say, Taylor Swift cat or perky white cat), they just CGI'ed out the human ears which does up the uncanny factor, whereas on stage human ears were covered by the big 80s hair style wigs and sideburns, which is why cats like Judi Dench's Old Deuteronomy or Ian McClellan's Gus are less weird looking.
I did just read someone explaining that they for a lot of the cats with shorter hair (say, Taylor Swift cat or perky white cat), they just CGI'ed out the human ears which does up the uncanny factor, whereas on stage human ears were covered by the big 80s hair style wigs and sideburns, which is why cats like Judi Dench's Old Deuteronomy or Ian McClellan's Gus are less weird looking.