OnScreen for Windows, no, but you do have a variety of sizes to choose from. That's what the WordComplete component is for. But we have quite a few other features that they don't, and vice versa probably. Best thing is simply to download demos of both products and try them. Yes, but we don't recommend using the touchscreen for small buttons.
Touchscreens work best with large buttons.
The buttons in OnScreen will be difficult to accurately operate. We offer a 30 day moneyback.