Fyne F1-10/12 vs Harbeth 40.3 XD and Graham LS5/5

I am very interested in the Fyne F1-12 and F1-12S. Do they create a large soundstage? I have Harbeth 40.3 XDs and Graham LS5/5 powered by an Accuphase C2900/A80 comb. I also have a pair of Rythmik 15” subs. Room is 5m x 10m with 2.5m ceilings. 

Any thoughts on how the Fyne F1-12 would compare to the BBC style big Harbeths and Grahams? (The Harbeths and Grahams sound great to me.  But you know how this hobby/disease goes…)  I listen to acoustic music as well as classic rock (Beatles/Stones/Neil Young/Grateful Dead/Little Feat) and much of it was originally mastered on BBC speakers    I used to have Focsl Scala Utopia EVOs and I didn’t really like them   They made my ears ring and they just weren’t enjoyable (to me) for long listening periods  

There are no places near me to demo the Fynes. Finally, is there a big difference in sound quality between the F-12 and the F1-12S? Prices of second hand F1-10 and F1-12 are not unreasonable. New F-1-10/12S are pretty pricy. 

Any thoughts from someone that is familiar with Fynes would be greatly appreciated. 
 

Thanks,

Lew