Most of our sales are still the mini as there is only speculation on the "full" Z9. Buyers know what the z9 mini can and cant do as well the next batch is slated to ship sooner than the Z9.
Z9 is a good buy but the Z9mini is a safer choice when looking at these two models by bitmain.
I am starting to second guess my choice to not buy more mini's. I was worried about the forks, and in the back of my mind I think Bitmain is about to release new sha256 and scrypt miners. So I thought I should hold onto some cash in case that happened. But I thought for sure Bitmain would be dropping new miners on us by now since all their coupons are expired.
There will be asic friendly coins to mine with these. Look at the X11 algo, and cryptonight. you just might not be able to mine the coin you would have preferred or bought the unit for with future forks. If you bought the z9 "full" you'll be fine, bitmain will at minimum deliver their base spec, just with the mini we know how much we might be able to OC.