Ha! A pic that I recently posted is estimated by beersmith as 7.8 and is much darker than both of those. It has been quite a source of confusion for me. The only conclusion that I have come to is that what was labelled as vienna malt was something else. Sorry to go off topic...
I have a blonde ale that looks similar to the one on the right. It is on the dark side for a blonde ale and is estimated at 5.6. My perception has obviously been decieved by what beersmith is telling me...