usually dyno tunes better coz they actually put the car on rollers so they can see what engine data is on high revs and all that stuff, dyno tunes in canberra is around $150 :( but its worth it sometimes. usually ppl to one dyno tune then other times they use that data and they jsut tune it but sometimes ppl rathre put all the time on dyno. p.s if u adding microtech or changing the computer u better to do full tune.