Well, first of all, they're not even the same characters.
Mandy was playing Che Guevara, the anachronistic Cuban rebel (hailing from Argentinian roots) from the 1960s... commenting on the (primarily) '40s and '50s storyline in "Evita."
For the film (and ALW and Rice have discussed this several times), they along with Alan Parker decided to change the character entirely to just a generic "Che," and no longer tried to make him "Guevara" in any respect.
Mandy worked fine on the stage, but after seeing Antonio in the film, I much prefer him. He is more smoldering, more sexy, more humorous and witty, and (let's face it) LATIN in the part. It works better.
However, that said, both roles are "intrusive" and by the time he gets to singing "forgive my intrusion," I always felt like shouting back "NO! Shut up and get out of the way!!"
...And I even understudied Che once in "Evita." It's an annoying role.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22