hi ganesh,
i am partial to the one in color for two reasons:
1. dawn's colors were special when seen from kodachadri - at least i rarely see such colors at sunrise! your image had captured the audacious palette very well.
2. the composition... the almost gaussian curve in the colored version gave a visual cue for where the fireball was going to rise... there is a rhythm in that image which might be lost in this crop...
that said, i like both in their own merit, if i were not to compare.
a