The Ashtanga & Angels blog — whoa, when do angels ever appear?! — has gone through the first and second editions of Sharath’s book and cataloged the subtle differences.
Probably the most obvious is the pictures.
The complete run-through is at this wordpress document. An example (my formatting):
33 Sūryanamaskāra B: ṣaṭ 6 …pull in the stomach completely, gaze at the navel.
…pull in the stomach completely, and hold the position while gazing at the navel.
Seems that much of the changes are to clean up the Sanskrit. But there are some slight variations to vinyasas, notably to Sirsasana. I’m not sure you’ll be discovering a whole new practice, though.
There is this: The final resting pose “is called sukhāsana.”
Posted by Steve