Maybe if I compared them side by side, I would notice the difference.
Otherwise I have no idea what you are talking about
When I was adjusting to Sony Reader I tried both fonts Times and Swiss. I wanted to use swiss because I believed I liked it more but I have noticed that Swiss italics are a lot less "visible" than Times italic. Swiss italics were there but they didn't really stand out like Times italics. It is like Harry Poter books were italics are very very bad. Since then I use only Times where italics and bold are very clear.