Can anyone tell me the difference between these toners:

Fotospeed Gold Toner

Formulary Gold 231

Formular Nelson Gold

I am interested in a gold toner and these seem to be my choices. Are there any differences in the three or are they all just standard gold chloride toners? My main papers used are Oriental Seagull RC 2 and 3, Agfa Multicontrast Classic RC and Fiber, and Azo grade 2. Thanks for any info!