Quinoa,
"throws" are in reference to being able to adjust the length of travel of the servo through settings on the real transmitter. "exponential" is a term used to describe desensitizing the control stick. In a real transmitter, this adjustment can be done through settings in the transmitter. The larger the exponential the less sensitive the stick. I should mention the benifit of exponential is that no matter how much the exponential is changed it does not effect the overall travel of the stick.

Now, going back to your original question, a real transmitter can do these things "in" the transmitter. The transmitter that can be ordered with FSOne is a "TracCon". TracCon is a box that looks very real as a transmitter, but has no internal adjustments. The terms above, exponential and throws can still be adjusted, but they are done in FSOne.

Which is better for you? That is always a difficult question for anyone to answer. How about this; Buying FSOne will save you a lot of money in learning to fly. I have it and it is worth having. Get the one with the transmitter. Just my 2 cents.
Scott