Difference between Mac and PC Fonts in Adobe

I recently was asked to do some research in purchasing a Mac since we plan on
doing more of our design work in house. One of my manager's concerns is that our
designers currently use Mac when designing anything for our website. I currently
have CS2 installed (will upgrade to CS3 soon), and it does not contain the Gill
Sans Light Font, which is the main font our designers use.

My question is, if I purchase this font from Adobe, is there any difference at
all between the fonts if I were to alter some of the words on Illustrator or any
other application on my PC as opposed to if our designers did it on a Mac?

So basically I'm asking if I purchase and use the same Gil Sans Light font on my
PC to alter something would it be exactly the same as if they did it on their
Mac? I just think it may not be practical to purchase a Mac for this sort of
reasoning if purchasing the font and just upgrading the software would yield the
same results.

Thank you.

If you license the OpenType versions of the fonts, there is no difference
whatsoever between Windows and Macintosh. There is no Windows or
Macintosh-specific versions; it's one font file used for both systems. For the
older Type 1 fonts, there was a difference in the file formats between Macintosh
and Windows, but the fonts were logically the same.

By the way, Adobe does not sell any fonts; it sells font licenses!

Thanks Dov! Yes, I meant to say purchasing the font license, sorry!

Sorry, I am still a bit new to some of this stuff. So if our designers by some
chance were using Type 1 fonts would their be a noticeable difference? Or is it
just the formatting but the display is the same? If I were to open an
Illustrator file with a Type 1 Mac Font used would it give any sort of problem?

Thanks again,

If your designers were using Type 1 fonts from Adobe (the Windows users using
the Windows version of the font family and the Macintosh users using either the
Macintosh version or the Windows version of the same font family - Adobe
applications on the Macintosh can use the Windows Type 1 format), the results
with Adobe applications should be identical. I cannot vouch for what happens
with fonts from other font foundries. I would hope that they would be at least
as careful as we are with making sure the Windows and Macintosh versions match.

See that's what I thought but our designers suggested otherwise. But looking
online I couldn't find anything saying that the display of the two fonts would
be different.