the coilpack ecu will selflearn to some extent, so a 1.0 on low boost should be able to match the 1.4 power output without a remap imo (with slightly bigger injectors)
i tried a similar size turbo on my 1.0, and found it very laggy, the ct9 was designed for a 130hp engine really.
the main problem with the coilpack ecu seems to be that the self-learn feature tries to "correct" any changes that were made when its been remapped