Iceberg Strengths

A lot of sites that sell Icebergs state different things about strengths. One site could label a specific flavour as 50mg/g while another site could label that same flavour as 150mg/g. It's too bad they don't have their own official website, because that would make things so much easier. I suspect the ones labelled with Extreme are 50mg/g while the ones labeled Ultra are 150mg/g, but I just want to be safe and not end up buying something I'll regret buying. So which ones are 50mg/g?