I guess it has been a couple years since I have installed wampp, so I would not be a great judge.
If you really were looking for an answer out of me, I guess my somewhat uninformed answer would have to be that I do not remember quite so many additional module installation choices in wampp.
About a year ago, I worked for a tech center for about 8 months. All of the techs when asked individually had mentioned to me that, although wampp had been the leader for many years, xampp at that time had more of a development base and as a result, had become a bit more user friendly than wampp at about that time.
My choice to stick with xampp is dependent on the notion that this has continued.
One example of this would be that if this person had installed xampp, they would not be asking where to install anything. It walks you through it.
Hope this answer is sufficient.