Oeps, very expensive stuff. Price almost double MG IV FB.
I do not know if I should give it a try.
I do not think that the quality will be double as well...
and to me MG IV FB is already really good.
I value the Galerie double, though I agree MG IV FB is very good.
If it is not too expensive for you, you might buy one grade to try (instead of both), then use it when a negative fits. It won't be wasted money because you will get good prints.