That's a very nice site! Good find!
Those results were obtained for quite early firmware releases though, so they need to be taken as such ... and also two of the LiteON burns were done at 2x rather than 4x so they can't really be compared as such ... but even so, one has to agree that the BDR-206 results are still pretty disappointing in comparison with the other contenders...
However, the Pioneer BDR-206M is a different story:
Now that is quite impressive ... even more so given that the results above came from a newly released BDR-206M drive which still had its original firmware release on board, and in spite of this still managed to beat both the BDR-205 and the BDR-206 (both of which had far more mature firmwares on board)!
The BDR-206M uses a different chipset than the earlier BDR-206 series.
Like any review, this sort of results are still just a one off snapshot ... so it would still be useful to have a look at the relevant threads for more real life burning examples and scans made with different drives and at different scan speeds (so one can ascertain repeatability) before making a final decision.
Furthermore, those scans were all done at 2x, which is really too low ... I would rather prefer seeing some higher speed scans, such as 4x or preferably 'standard' 6x scans or maybe even 8x scans ... Those might well show quite a different behaviour ...