Rascally said:
In my EJ DE89
Best blades:
PolSilver Super Iridium - smooth, sharp and long lasting
Personna Medical Prep - very nearly as good as the PolSilver, but not quite.
Worst blades:
Personna Lab prep - not as bad as Derby but was another rough blade that cut me badly.
Interesting, I use a DE89L.
I recently tried a PolSilver SI and found it ragged, leaving me with a lot of nicks while not providing a great shave either.
Tried a Lab Blue yesterday and it was excellent, smooth finish and no nicks. One of my favourites so far.
Med preps are next up (I have a stack of blades to try).
Only used on blade of each, so probably premature to call the results definitive though.