about oly 45/1.8mm ane PL 25/1.4mm

The main difference between those two are the type shots the 60 can take on its' own that the 75 cannot, which is anything closer than 2.76 feet, or you gain an extra stop of light with the 75. I've tried the 75 with the 10mm Kenko tube to get closer, and it does work, but the 60 is made for closeup shooting, handles the shorter distances much better and it does make a very nice short tele for normal picture-taking.

I can see the 75 being almost too tight a view for many users. With the extra close-up utility the 60 will probably be a better overall user for many.

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"There's shadows in life, baby.." Jack Horner- Boogie Nights