To be honest, Mike, I tend not to bother about brand, at least for kasoori methi. I just buy a large bag of whatever brand is available from somewhere like Costless (Plymouth). I suppose if they had several brands displayed close together I might do a visual comparison, but in general MDH, TRS, etc., are all fine, so I just buy whatever is available at the time. Since you have clearly carried out some basic comparisons, which brand do you prefer, and on what basis or bases ?
** Phil.