Looking for "Greek Mint"

I found your site from the forum at icangarden.com. I was living in Hamilton, ON, and was given a wonderful mint that the person called "Greek mint". I used it for everything from salads to mojitos. Reddish stems, smooth crinkly, oval leaves with a toothsome substance and a mild, lovely flavour. I've tried peppermint – not the right flavour – and spearmint falls apart when you crush it and is fuzzy!
Would the mojito mint be hardy to a warm 4b? Could you recommend another mint that might be close to what I am looking for?

We are not familiar with "Greek mint". There are thousands of different mints, and among the classic varieties such as spearmint there are many variations. And because there is no formal system for naming mints, national names such as "Greek mint" can get applied to more than one of these variations which can make it difficult to sort out one variety from another. It is possible that "Greek mint" is known by another name, or it is possible that it is very similar to another mint. The only way to tell is to compare them side by side.
Among our mints, the one that may be close to what you are looking for is what we call scotch spearmint. It is also known as American apple mint and red mint. It has dark red or reddish purple stems and dark green leaves. There is a picture online at:
www2.richters.com/Web_store/web_store.cgi?product=X4044
I don't think mojito mint is what you are looking for. Here is a picture of it:
www2.richters.com/Web_store/web_store.cgi?product=X4025