They look to be identical.

Do you mean bolt catch and disconnector spring? Those look similar, but notice the taper on the disconnector spring. They are not the same.


ETA:  Stupid me. You said ejector.

I doubt they are the same, but I've never checked.

Assumed it was another newbie assembling a lower post. I've honestly never had the two side by side.

Then I found this:
http://beta.ar15.com/archive/topic.html?b=3&f=4&t=468199
Not definitive proof - but someone thinks they are the same.


A little bit more like proof:
http://www.brownells.com/1/1/31345-ejector-selector-spring-ejector-selector-spring-colt.html

They are the same. Same part number in the TM.

while they certainly look the same,and could interchange, SAW has  slightly different numbers for them.
the ejector spring is sp61569A, while the selector spring is sp61569.

Same part. Maybe they list two numbers to keep inventory or invoice printouts so people do not think they got the wrong part. Check the parts drawing.
http://www.coltcanada.com/techpubs.htm

http://www.brownells.com/.aspx/pid=0/sid=802/schematicsdetail/AR_15_Bolt_Carrier_Assembly

Yep - they're the same.