Raven and nightfall.

[zmanbuilder]

They do not use the same weapons, raven had a ludlow with the scudder on the back, while nightfall has the scudder in hand with the songbird on the back.

You can examine Ravens AC in the first mission, and it lines up with the AC in the reveal trailer.

[Call Sign: Raven]

Do they both have Pile Bunkers?

[Wutever]

Pilots can change their gear, but it is also stated that Raven is more of a title held by many pilots rather than a call-sign used by a single person. It's completely possible that the Raven you get to fight is not the same that you took your name from.

[zmanbuilder]

Originally posted by Call Sign: Raven:

Do they both have Pile Bunkers?

Left arm and left shoulder are the same on both.

[Call Sign: Raven]

I just checked. Ludlow and scudder on right, twin missile launcher and pile bunker on left. Neat! First one where you get the license that is.

[✰N0ni✰]

After examination it is actually Nightfall minus the Ludlow. AC was probably picked up after you leave (hot LZ you fighting the heli) and the Ludlow was replaced with the Songbird.

Much like during Ice Worm V.II Snail has a Diffuse Cannon and doesn't have the needle launcher until later when he uses it on you after you defeat Ibis.

Despite the Ludlow though, it's Nightfall down to a T, same parts and paint scheme.

[Belmont]

The head is specially commissioned. Besides 621, Nightfall is unique to the original Raven.