I believe PS is using a different engine than Motion that handles text. This might help explain some of it:
http://www.adobe.com/devnet/fireworks/articles/adobe_text_engine.html
Adobe changed how it handled typography a bunch of years back...which was a giant pain with regards to Illustrator:
http://www.creativepro.com/article/the-creative-toolbox-the-legacy-of-illus...
Ahh...growing pains.
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