In my part of the world, the answer to this is blindingly simple.
In July, buy whatever you can, if it's local. And rejoice.
Usually, the first apples that are ready to eat here are Vista Bellas. Last year we had some Jersey Macs for sale on July 15. They were unripe but I found I preferred them that way.
This year, when the growing season has been so crazy, who knows?
Early apples do not keep, so buy them in small batches and eat them quickly.
You can also read my look back at July.