Kathy
What you've got is not Black Krim. BK has regular leaves. .
Most Potato leaf types are huge like that. I am growing just 2 varieties with PL. Brandy Boy has real big leaves.
So, anyway, you won't be able to tell what you got until you have ripe fruit. Even then it can be a guessing game.

Sey

It is right next to Brandywine in the nursery. Hmm.

OK. That figures : Next to Brandywine . Hmmm.

A good probability is accidental tag switch. So you are maybe growing a Brandywine.

Sey

It is an incredibly robust plant so it has to stay. I guess it will be a surprise for me and that my be fun. Sometimes it is fun to try something you never would have gotten by yourself. (But there are reports of BK having crossed and becoming potato leaf.)

yeah, probably tag switch. In general, lots of nitrogen will produce larger leaves too.