I have been trying to figure out what eyepieces to thin out too.
My target is Jupiter, centerfield, 10inch f/5 dob.
I have been comparing TMB clone 5mm to paradigm ed 5mm
Same for 8 TMB vs 8mm paradigm.
The 5mm tmb is better then the paradigm ed, center field more festooning better colors are apparent.
The 8mm the paradigm is better than the tmb. But this is only
marginally so, not leaps and bounds.
And ... I highly suspect this is more to do with sampling of the eyepieces then
fundamental design differences, or manufacturing tolerances.
If eyepieces are anything like computers (I work in the business) parts are outsourced from
all over. In a certain computer even with the exact same make and model. the inside parts change.
internal parts are bought in batches, and when the batch runs out another batch Is purchased,
Maybe from the same vendor, maybe from a competitor. Even though the spec sheet of two different
batches are the same, they are not exactly the same. the word similar comes to mind.