Summit nano head vs the shorty

Looking for personal info from people who have used them and which tbey would recomend? Speed, seperation, etc. i have many summit heads and would like to this to be my next just wanna het a lik real workd feedback before i soend the money

There was a small tidbit of info about the shorty from @anon42519203

I’m curious to know more as well. We started off with a not so awesome head and had problems with and ended up going dow to Summit to pick up a better head which looks like the SPD-2 but with 3 sets of vigs instead of the 2 that they now show for $1,100 but ran us 2k. Would like to hear what the differences are as well!