CLOSED: Sparrow ID?

Pretty sure the one on the left is a chipping sparrow, but what about the one on the right? It isn't any bigger than the other one. I'm attaching another pic of the one on the right alone if that might help.

Here's the 2nd shot of him alone.

Both Chipping Sparrows; adult on left, juvenile on right. They start out streaky like this until they're a few months old.

Resin

Thanks, Resin! I've started seeing a bunch of the ones w/o the rufus head, and now I know why