Comparing the 116 & 135 ECU tunes shows that they also reworked the throttle maps as well, no doubt to liven it up a bit particularly in the mid range. Picture attached showing the increase on the throttle map from 116 to 135 (note: there's alot more to the mapping than just this)
Further mapping (if done correctly) livens it up even more and can add a decent boost to ~150bhp with a strong torque gain