Pics: as much as i've seen of her, #1 and #4 are totally Silk, #3 is close, #2 is iffy, and #5 is totally not her. (Numbers are top to bottom.)
On 5th ed.: lots changed. Biggest was maybe how matrix and rigging is handled. And now, hits are not only limited on spellcasting tests, but all. And they brought back the priority system for chargen, although a lot changed there as well. Augmentation prices were almost completely rewritten. Combat is slightly different, and initiative changed, it's closer to what it was in 3rd ed.