Marti Pellow really feel the song and put a prt of his soul on it. The new vocalist is not bad at all, great singer, but he does not feel the songs like Marti do, not even close.
That was standard for those sort of TV performances, even today. There's one TV show performance in 1991 where normally they would mime but performed totally live, check out Wet Wet Wet - Put The Light On - Wogan - 1991 . None of it is miming.