For the MR-1 based on tech specs:
- The MR-1 has a built in 20GB HDD where as the R-09 uses flash media.
- The MR-1 has balanced inputs as well (although they cannot handle hot input well and using attenuators is recomended by many on this board - either this or going through the menu's to set the input levels very low on the recorder) - The balanced inputs will allow more compatable use with Pre-Amps without consumer outs (i.e. V3).
- The R-09 has a maximum recording setting of 24bit 48KHz where as the MR-1 can record upto 24bit 192KHz in PCM or 1bit 2.8MHz DSD.
- MR-1 has a much bigger display than the R-09 (Good for those who have a hard time seeing like myself
)
The MR-1 is pretty new and I think is Korg's first attempt in the miniture recorder market so hopefully some of the issues (such as how deep setting the levels is in the menu) can be fixed over time with firmware updates.
Update: KORG has now added a shortcut to set the recording levels in the new v 1.5.1/1.5.0 firmware for the MR-1:
From the MR-1 Firmware 1.5.1 Release Notes PDF:
"Shortcut in the recording level setting screen
While recording or in record-ready mode, you can now press the P-dial to jump to the recording
level setting screen. This lets you instantly adjust the recording level."Jerry whom works for Korg has been providing updates and answering quesitions on the forums on this site where as Roland/Edirol doen't seem to care as much. (i.e. from what I have read Edirol seemed to blow off the issue with the input jacks breaking on the R-09 - when a lot of people here complained directly to them)
FWIW - From what I have read the MR-1 has the same Burr-Brown/TI (PCM1804) AD chip used in the V3. Again the front end put in front of the AD will influence performance (and I am sure the Grace Front end smokes the MR-1's). Where is the link to the tests?
Honestly I haven't used either but I do have a MR-1 on the way.