I always thought the pope looking like Palpatine was odd because MOST of the old cardinals look like Palpatine. They all seem to age into the same generic old person.
Are you saying all old people look the same? That's so ageist.
ETA: For what it's worth, I thought during his first appearance Francis I's habitus, speech and body language were totally different from Pope Sidious'. Gave a very different first impression I think.