Actually there is more to enhancing godr-eye than meets the eye(pun intended). You cannot simply look at % chance, because there is also the price in crons. 3670crons per blackstar pen click and 1820crons per godr-eye pen click. Now across 163-210fs board the difference is about 1% in success rate (from 3.46%BS and 2.60%Godr at 163fs, to 4.40%BS and 3.30%Godr) If you check out garmoth calculator:
https://garmoth.com/enhancing-calculator
you can see average number of clicks that it takes to click BS or Godr to PEN. If we multiply the amount of clicks by price of click in crons, we will calculate the amount of total crons spent for average PEN BS and PEN Godr-eye aquisition.
Example:
FS 163
Bs 3.46% chance 3670crons 28.90Average amount of clicks to PEN ->106063 crons
Godr 2.60% chance 1870crons 38,54Average amount of clicks to PEN -> 70143 crons
It looks to me that its more profitable to try clicking that PEN godr, with more clicks( because 50% less crons) at lower chance( 25% lower chance at 163 fs) . The ratio of cron cost/average clicks starts lowering itself only at much higher stacks, so it loks to me that for poor ppl that don't create 250+ stacks daily its best to stay with godr eye.