If the DAC is the same, how different do CD transports sound?

I had an Oppo 970HD connected to a MyDac.  it sounded ok then I swapped out a Tascam CD-RW900MKII again through the MyDac.

The sound was much richer fuller, the Oppo sounded thin.  I was pleasently surprised

@knock1 : without a blind test with matched levels your reporting is only anecdotal. As Perry Mason would say "Can't stand up in Court".

In an A/B comparison the unit with the higher output voltage will sound better. That’s how we humans respond! The difference can be as little as .1 of a volt or less! That is why matching the output levels is so important! This applies to DAC'S and preamps too!

When using an external DAC, isn’t a CD player really just a streamer? In my experience, streamers vary significantly in their performance and are affected by noise and jitter. I have doubts that fancy transports make a difference, they are just reading data, and the real magic happens between the drive and the digital output of the player. Thoughts?

Your CD player will sound different if you use it as transport, you will hear the digital cable , interconnect, and pc used by your DAC. I find using DAC is better.assuming  it matches .Not always its up to you how you will utilize The changes.