As i said before, that "drop down" menu module has absolutely nothing to do with our VM Template, this comes with the Joomla Template we have used in our DEMO section, which is beez_20 (the free template that comes with joomla officially) If you use beez_20 along with our VM Template, you will get the same dropdown menu module.
If you ask me i would say PureMArt is better, not just because it is the newer one (all of our VM2 templates are supported by the most recent Virtuemart version: VM2.0.14) but PureMart has some additional features (such as; enlarging picture with a nice transition effect when the product picture is clicked, and also it has a "multi-grid" view option in the category browse page which is also an additional feature.) But on the other hand, fashionMart has "slider" effect in Virtuemart Frontpage for "top10" and "Featured Products" section while PureMart has tabulated view, of course the "slider" effect is much cooler than static tabulated form. All in all, it all depends from people to people. There is no such thing like: PureMart is the extended version of FashionMart, no it is not correct.
Cheers.