Here are a few helpful links:

http://poser.smithmicro.com/comparison.html

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2802257

Also found within the forum:

Poser Pro 2010 advantages:

• Runs the executable (scene setup, etc) in 64bit, and most important, it renders in 64bit, so you can bring lots of RAM to bear.
• Extra capabilities in import/export of geometries (Collada, etc.);  important if you model.
• Render in network, applying all of your computers to a project;  great for rendering animations.
• Gamma correction rendering
• Fusion with high-end studios

_____________________
.::That which does not kill us makes us stronger::.
-- Friedrich Nietzsche