Darley Model 3 or 2?

[SamtheSirenMan(531)]

So this is probably gonna sound stupid, but I don’t fully know the difference between a Darley Model 3 and 2. So the map that I use claims that all these sirens are model 3s:
https://goo.gl/maps/vpbScSgijqMZbajz9
https://goo.gl/maps/qaKCCNxa5YfsDWXz5
https://goo.gl/maps/msujACnnvxcM2sL47
And that’s just a few. The problem is, on the pics on the internet show the model 3 looking like a Darley 5, and the siren that I think is a 3 is actually a 2. BUT, to me these sirens still look a bit different to a two, the curve of the top shroud looks more even, the shrouds look farther apart, the shrouds are shorter and they look a lot shorter and stubbier. So I am reaching out as I am working on a map right now and I do not want to mislabel a bunch of sirens.

[CanadianTbolt1003]

I believe those are GCS Model 3's I don't know much about GCS but I do know what they look like.
Here is a video of one - https://www.youtube.com/watch?v=zN5Qyic0yME

This is a Darley Model 3 - https://www.youtube.com/watch?v=Jlf7qxuBCSc

[NottaFoamer]

I believe those are GCS Model 3's I don't know much about GCS but I do know what they look like.
Here is a video of one - https://www.youtube.com/watch?v=zN5Qyic0yME

This is a Darley Model 3 - https://www.youtube.com/watch?v=Jlf7qxuBCSc

Yes you are correct, those are GCS model 3s (the attached file is a darley model 2 for the other guy)

[SamtheSirenMan(531)]

How rare are they? Because there are like 3 or 4 of them within an hour drive of me, and I can’t find many videos of them.