I never worked with Spire and Strobe. So it's just my guess about this synth.
1 - I like it smooth sound. I think it's Zebra
2 - This is really bad unison and a lot of hiss. I guess it's ANA
3 - This is really creepy sound and unison pretty sylenthy. It's Sylenth.
4 - Strobe. Really don't like the unison, but I think Strobe sounds different.
5 - this really sounds like old Diva version. Cause in new Diva there's a digital oscillator which sounds more modern.
6 - Spire. I don't know why
That was fun
Interesting look at the answer