What among D or G should be preferred between 60mm macros of Nikon?

A Nikon D lens needs a camera with a motor in the body to AF.  The designation AF-S tells you a lens has a motor and can AF on a body without a motor.

A Nikon G lens has no aperture ring.

In the case of the 60mm f2.8 Micro the G version has AF-S.  Note for the future that not all G lenses has AF-S.

This is a useful link :

http://www.bythom.com/lensacronyms.htm

If you can use either on your camera with AF then either are great lenses.  Although they have different optical designs they are both excellent performers.

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StephenG