[XeTeX] True Type vs Type 1

[Atip Asvanund]

Panther has built-in Lucida Bright in the True Type format. I have also 
purchased Lucida Bright from YandY, which is in Type 1. I use XeTeX to 
generate a document using True Type Lucida Bright. Then, I use regular TeX 
to generate the same document using YandY Lucida Bright.

When using Acrobat to view the two results on screen, I get strikingly 
different results. The Type 1 version of Lucida Bright looks much better 
than True Type. I read on YandY that Type 1 has easier hinting than True 
Type, and I assume that this may be the explanation?

What is stranger is, however, when I compare the two files using Preview. 
True Type Lucida Bright looks suddenly almost the same quality as Type 1. 
Preview displays True Type much better than Acrobat does.

Even though on screen they look different, they all print at the same 
quality.

So, is it that Preview has better capacity for displaying True Type on 
screen? Or is it that Preview uses the Lucida Bright on my computer rather 
than the embeded Lucida Bright in the PDF. I am concerned about this 
because I would like to use XeTeX to generate documents using True Type 
fonts (not just Lucida Bright) to be viewed by those on Windows, who are 
stuck with Acrobat.

Thank you,

Atip