A remap is better if available however yours will be chip only and the gains if any are small.
A chip and remap are the same thing at end of the day, the software is getting edited (re calibrated / remapped) So a chip is a remap at the end of the day, its just then method used to get the remapped software on to the ecu. With a chip you have to open the ecu and remove the chip to write the new map to the ecu, then you have OBD remap which flashes the map via the OBD port in the car and no need to touch the ecu.