What is the difference between lightbox in jquery and VisualSlideShow?

Q: I found 2 products: VisualLightBox and VisualSlideShow. It seems that both applications are products of your company. Both applications work with images... So, what is the difference between VisualSlideShow and VisualLightBox?
I plan to buy one of your products for my website.

A: VisualLightBox app. generates web photo galleries, images appear in a pop up window.
VisualSlideShow app. generates slideshows, images appear with transition effect. Slideshow doesn't appear in a pop up window, it has a fixed position on your page.

You can compare demos on our websites: