It'd be embarassing for the buyer if they got the two cars mixed up, assuming they bought an award winning purebred, only to find out it's a tribute show pony.
Outside of being pink there isn't much the same about them. Plus, I'd think if I was going to an auction with $62k burning a hole in my pocket I'd know which day the car I wanted was being auctioned on. But maybe some rich bastard couldn't be bothered and just saw the pink car?
Like I said, it'll be interesting to see what the cars going on Friday and Saturday bring.