Difference between QUALITY CENTER ENTERPRISE and ALM

Hello gurus,

What is the difference between HP Alm and Hp Qualty Center ?

I saw on the website that you have 2 different products:

http://www8.hp.com/us/en/software-solutions/quality-center-quality-management/index.html?jumpid=va_7d3b9mpfks

and  http://www8.hp.com/us/en/software-solutions/alm-software-development-testing/index.html

If I download the trial, I get the same sw. How come?

Is it the same thing/license/price?

Many thanks!

Kind regards,

Mario