I was in a Sears store the other day and the Maxell sale for $13 a 50-pack is still going on if anyone is interested. I saw plenty of 8x -R MIJ spindles which should be MXL RG03 made by Maxell/Hitachi. Of course YMMV. This time I was at the Greenwood store on the south side of Indianapolis. I was there to clean them out of Sony 8x +R MIJ TY02 via the BB price match.
Frankly, I'm not impressed with the scans of the MXL RG03 media. The scans in the OP were burned and scanned with a LO160P6S. I burned a few in a BQ1650 but they were worse. Had to use overspeed as the BQ only recognized them as 2.4x media. Firmware support for this media must be iffy.
I'm sure it's decent media, especially with the right burner, but for $13 a 50-pack better can be had. At least this is true in the States. I went back and reread the links in the first post and some of the posters discussing this media were from Australia or England.