The cards serve no other purpose than causing the protectrons to help you fight nearby enemies when in the associated red and blue subway lines.
Also in New Vegas they were called Key Cards, when you are in Vault 19.
The main differance that I got was the circuit print is the reverse between the two. I drew them from looking at the images on the wiki.
Since there is fine circuit detail I put into the items. These are the settings I used to get them to print on my Replicator.
infill : 15%
Layer : .2mm
Shells : 0
Feedrate : 45
Travel : 45
Temp : 220
If need be I can upload the s3g files.