My interest in the Versa is b/c the LEAF was based on the Versa chassis. Indeed if you look at the pictures here:
http://www.nissanversaforums.com/how-to ... brace.html" onclick="window.open(this.href);return false;
and then here:
http://www.ebay.com/itm/NISSAN-LEAF-201 ... vi-content" onclick="window.open(this.href);return false;
You can see that both have the "female" top hat. I'm guessing that they are indeed the same.
That said, I contacted K Sport and they said they tried to install their Versa setup on the LEAF and it didn't work (suspension was "completely different"). The person that responded didn't sound like they knew that info first hand, and also didn't sound too confident when I pressed them. It's still worth looking at from everything I have found on the web (images), though.
With the weight difference, if they are form/fit compatible, the "function" (spring rate and damping) can be overcome. As it is, coilover systems such as TEIN or K Sport are usually 3x to 4x stiffer than stock. The springs can also be changed out, in many cases, free of charge from a manufacturer. If not they are usually less than $50 apiece and I am thinking you will only need to change 2 of them. There are also plenty of cheap alternatives for coilover springs which are typically standard sizes. The coilover shock/struts are also usually adjustable enough to compensate for all but a 2x change of the spring rates they were designed for.
All that said I am very optimistic here. I don't see a lot of cheap alternatives for coilovers for the Versa, but even if we can buy a K Sport setup stateside and change out springs, it will be much cheaper than importing a TEIN setup that reuses top hats, doesn't offer camber adjustment, and is painted steel and going to rust in a few years.