Gimp is easier to make stuff on as its more user friendly. However if you want a image that can scale up and down without loosing quality (which is useful for a rpg map) inkscape is better.
Self quoting is the key to sounding wise and all knowing.
These were autumn mornings, the time of year when kings of old went forth to conquest; and I, never stirring from my little corner in Calcutta, would let my mind wander over the whole world. — Rabindranath Tagore, The Cabuliwallah