I've studied Spanish for about 10 years, and I took a semester of Italian this past fall.  I found Italian grammar to be a bit more complicated and have a few more irregularities than Spanish grammar, but the difference wasn't large.

Spanish and Italian grammar are so similar

I have only learned Spanish but I can tell you that after learning Latin and French I found Spanish to be very easy.But you should choose according to which one you love more,which culture interests you more (music,movies etc) because neither language is that difficult I think (it depends on your mother tongue though)

I would chose Spanish.  It is a popular and pretty language.

Mr Dr in fact my question was about grammar not about if it's common in morocco or not, by the way thanks for your opinion.