[cobirds] Lillian's or not?

Here are two photos of the eastern meadowlark at the northern end of Bud Mielke reservoir taken this morning. This bird looks a little different to me from the bird I photographed on May 29. The cheek looks a little more white and the yellow on the breast seems to extend a little further down and on the side. So could this be the Lillian's meadowlark that was observed in the same location earlier in May? I'm not good at determining the subtle differences between subspecies, so any help would be appreciated.

Thanks,

Dan

Dan O'Donnell
djod@me.com