I have 16 (!) silver linear holos (and yes, there are still plenty that I don't have) and this comparison doesn't include any of the scattered holos.
I've got a few photos and a video and I'd love you all to comment below which one is your favourite.
After a few days I'll let you know which one was everyone's favourite as wells as which polish is which. The thing I loved about choosing a favourite holo from the ones shown in the Facebook group was that I didn't know which was which. I think you guys will find it hard to choose, because they are all so different and they offer different things.
For the record, my favourite is number 3 for it's intense flame, with second favourites being #9 for it's sharp thin flame and #10 for it's smooth fine finish.