Trying to find the difference between these 2 params, can anyone give some pointers?
They are equivalent. Moving forward from 12.2.1 (i think), you can drop the tangosol prefix from all -D params.
the prefix is currently supported as backward compatibility, but will be removed in a future release.
See 1.3.8 https://docs.oracle.com/middleware/1221/coherence/release-notes/technotes.htm#COHRY179