Forum:Aren't d3 citadel 02 and ep1 citadel 02 the same map?

I noticed while I was attempting to map out the citadel that two different games bare a striking resemblance to each other.

i.e. they are almost identical.

The maps in question are d3_citadel_02 from Half Life 2 and ep1_citadel_02 from Episode 1.

I was hoping if someone could confirm this and if there are any other common areas between games.

d3_citadel_02

 ep1_citadel_02 

Thanks.