I just want to make sure - I got it at two different places & didn't realize the difference 'til now.
I'm making chocolate ganache with it.
yes. the main difference between the two are stabilizers added to the whipping cream. It will not make a difference in the ganache.
The heavy whipping cream probably has a higher fat content. For ganache it likely will not be a problem.
Worst case, your ganache might be thin. If so, just add 2-4 ounces more of melted chocolat.
Everything you ever wanted to know about cream, ultra-high pasteurization and stabilizers: