Glupson,
Yes. Like all software, no two programs do things exactly the same way. There are only a few ways to do it well and many ways to do it poorly.
I use DBpoweramp. CDs can take much longer to rip with perfect rip where no errors are allowed.
if you allow errors and there are, DBPoweramp will complete the track rip faster but show that the track was not ripped perfectly. It determines what the right rip is by comparing to a database of other rips. Actual rip time will still vary with low quality, defective or damaged disks taking much longer still to rip than high quality ones of similar play time.
I find in very few cases where dbpoweramp indicates errors in teh rip are those errors clearly audible. They tend to be minor in most cases, but I have had some very bad CDs I have ripped and allowed errors with just to be able to get a rip at all and you can sometimes hear some defects in teh sound clearly. Not very often in practice though.