I also have both versions of PSE. Four seems to run similarly to three, with most of the differences being cosmetic in nature: when you crop, the check mark is right there at the bottom of the crop area to make it easier to click; you can specify the size and shape of your text box, and the text will wrap while you are typing; there is a "magic extractor" feature that lets you do a few clicks to extract a subject from its background.
My suggestion is that you "go for it" and try the tutorial. Remember . . . this is all digital, and you don't have anything to lose. Good luck!