The old " double red line" brand is no longer available for import, but the new Ibaraki brand has been chosen as a replacement by the importer.
On closer inspection, colour, and grain size are identical and when dry, both break up at roughly the same pressure if rubbed between the fingers.
Below is a photo with water added to both samples. Again, both breaking up roughly at the same pressure when rubbed.
I sifted a bag of each to see the yield of usable particles, using a standard 3 mesh soil sieve and found the distribution of particle sizes more or less equal in both bags, although the new brand seemed to have more of the fine dust.
I have planted up some young hawthorn saplings in both brands and will see how it stands up to our winter weather.