This slightly contradicts the reply from Motty above....
ABT is a tuning box, a sophisticated one, but still a tuning box. So won't make as much power as a custom remap, but will be in theory 'safer' than a map, or the sensor plug in tuning boxes as ABT plugs directly into the ECU, not just a few sensors and OBD port.. Hence the ST R getting warranty with it. I don;t think the likes of Racingline and Revo have released their 'generic' maps but word is they're also getting around 350.
Of course custom tunes will get more headline figures, but as I've said elsewhere, Revo and Racingline's maps are calibrations to work safely with the hardware, not go for all out power. Also a map on a dyno and a few runs down the road, is not the same a map that has been tested in cold weather, hot weather, cold starts, hot starts etc etc. This is what Revo, Racingline and ABT do with their maps/calibrations.