<p>
That’s really only true as to basic and possibly up to intermediate acting. After that, there really are profound differences. Defining them would take a lengthly essay or possibly an entire book, but I’d suggest that you read Patrick Tucker’s [Secrets</a> of Screen Acting](<a href=“http://www.amazon.com/Secrets-Screen-Acting-Theatre-Arts/dp/0878301771/ref=sr_1_1?ie=UTF8&qid=1361118198&sr=8-1&keywords=secrets+of+screen+acting]Secrets”>http://www.amazon.com/Secrets-Screen-Acting-Theatre-Arts/dp/0878301771/ref=sr_1_1?ie=UTF8&qid=1361118198&sr=8-1&keywords=secrets+of+screen+acting) which is the best book on the subject if you want to educate yourself about them. Just check the “Look Inside” option on Amazon and read what’s there of the Introduction for an idea. Actually, you can rent the whole book for a month for $7.06 if you have a Kindle. </p>
<p>That being said, there’s really not that profound a learning curve with all those considerations if basic acting has become reflexive which is part of why so many of our greatest screen actors come from a stage background.</p>