The fry and dolch lists are different. A lot of the words are repeated on both lists though. The dolch 220 words was a list of words that was created in the early 1900's. Since our language has changed so much since then, the Fry list was created as an updated list. At our school, we still test the kids on the dolch list. However, I use the Fry list in my classroom because I think it's more beneficial for the kids.
I use a word wall in my classroom to incorporate the use of the sight words. I introduce 5-10 words each week and then put them on the wall for the children to refer to them during writing and reading time.