How far can commercial copyright go?

I know, I know, A copyright-lawyer is going to give the best answer, but can you give me your thoughts?

I did a commercial for a local grocery store for a competition. After we submitted the entry there were a few people competitors who cried "foul" that we ripped off C V S Pharmacy spots. I hadn't seen those spots until they brought them to my attention. They really are quite different but share the idea of "this is MY store/pharmacy," which is nothing new to marketing.

I would like to pitch some more ideas to the store, but I'm wondering if I should change from "My name is ____ and this is my ____" to "My name is _____ and I shop _____" just to be sure it's different enough from C V S?

Here are the two spots, the first is mine and the second is the pharmacy's:












Am I over thinking this?

Thanks!

-Stephen