Is there any different between them?
I Don’t understand your question.
@Ralph_Ferro Is there any different between them? 
There is a Gap difference between the two left of center. :O) you may see it different.
I Don’t understand your question.
They are all different.
The forth last chair got light color
In hiding there are material differences due to colors being seen, but that can also be sure to the lighting…
@sMiles_Rogers all have the trap door behind them, lol…