Hi Rutvik,
There is no direct way at the moment to find out what nodes from the standard spherical mesh lie in which original spherical mesh. Typically the latter surface is the warped sphere. This information is discarded by the program MapIcosahedron but it is not too difficult to output a log if you really need one.
I don't quite understand what you mean by your last statement. Clarify if you can so I can say something useful.
cheers,
-ziad