If you're coming from an Ai100, the Pure Drive will have a lot of common characteristics. From my experience, the Pure Drive swings a bit easier/faster. It also feels much stiffer/harsher, so that's something to consider if you're prone to arm pains. Otherwise, both are very forgiving, user friendly sticks with plenty of pop and spin potential. I have not hit with the Lite version.
The Pure Control (295g standard version) is much more low-powered and control-oriented than either of those racquets, with a much more softer/flexible feel. You'll have to generate more of your own power, but it'll allow you to swing out more on your strokes. I like my Pure Strikes, but in either 16x19 or 18x20 patterns in the standard 305g (and the Tour version is probably out of the equation as it's a bit of a beast to swing), it'll probably feel/swing the most demanding for you out of all of these sticks. The Strike 100 16x19 (290g), however, may be an option. Very, very fast swinging frame, but even compared to a PD or Ai100, you're giving up a little bit of weight, and you're going to lose out on some pop and stability in exchange for maneuverability.
While I wouldn't personally choose a racquet based on aesthetics, if it's something you're considering, all the more power to you. As always, it's best to demo (either through TW's demo program or a local shop if available) before making a decision. And there's nothing wrong if you end up liking your Ai100 the best out of everything. It's an excellent stick.