you basically have a stock KO3 engine, so yeah its pretty linear and gutless. At stage 1, 2 or 2+ k03 is VASTLy different in the power delivery and MUCH faster.
A stage 2+ K03 TFSi GTI will keep up with a stage 1 S3 with no issues in anything other than soaking wet roads, or off the mark.
Also the k03 is also quicker to to spool up than the K04. Day to day drivability at upto say 100mph, id say the kO3 stage 2+ is perfect