- Eu não vejo nenhuma diferença. No Windows 7 e no Windows XP, ambos abrem as páginas da Web da mesma maneira em I8
Sobre o IE9
IE9 will have complete or nearly
complete support for all CSS 3
selectors, border-radius CSS 3
property, faster JavaScript, and
embedded ICC v2 or v4 color profiles
support via Windows Color System. IE9
will feature hardware-accelerated
graphics rendering using Direct2D,
hardware accelerated text rendering
using DirectWrite, hardware
accelerated video rendering using
Media Foundation, imaging support
provided by Windows Imaging Component,
and high fidelity printing powered by
the XPS print pipeline.
IE9 also supports the HTML5 video and
audio tags and the Web Open Font
Format
Recurso de Wikipédia
Um artigo interessante aqui , aqui e aqui