Is XAMPP (for Windows) preferred over WampServer? If so, why?

While I appreciate the effort of those who answered, I have not seen something directly addressing the issue. Thus, I'll mention some thoughts I've had on the topic:

• One possibility is that XAMPP is better known - or at least what people learned of first. While I heard of WampServer long before XAMPP, that may not be the most common experience.
• I believe that every time I've looked, XAMPP has had more recent versions of the included software.
• WampServer doesn't provide much more than Apache, MySQL, and PHP - just phpMyAdmin and SQLite, I believe. XAMPP provides phpMyAdmin, FileZilla FTP server, and Mercury Mail. Also, in spite of somewhat excluding this in the question, XAMPP includes Perl while Wampserver does not. So if Perl is needed/liked by the person making the recommendation, it seems likely that they will recommend XAMPP over WampServer.

I like WampServer because it is easier to have different PHP/Mysql versions installed for different projects.

I am using wamp server since long time. It's light weight and very easy to configure and do upgrades. Also If you need perl, you can simply install perl into wamp server. I also used xampp couple of times, but simply I don't like it. Also I heard it has some security vulnerabilities and need to reconfigure. Also it suggest to turn off UAC in windows (vista & seven). I think it wasn't good idea.