Tomorite likes to kid on it's organic with its "added seaweed," but it isn't, it's petro-gro; if it was organic, Levington would have it all over the bottle.
It was introduced in the sixties, when more Brits grew tomatoes in gro-bags, which people put on their gardens after the tomatoes had finished, giving the compost 6 months to recover.
It's not in the same class as Miracle-Gro, but it's far from organic, as is growmore.
The Osmocote Pro, I've never seen before, but the NPK numbers shout armaments.
Just had a quick look at the makers, ICL, and it's as bad as Miracle-Gro.
Blood, fish & bone is organic, fish meal, fish bone, & afaik fish blood, is my favoured bought fertiliser (I now mostly grow and forage my fertiliser, comfrey & seaweed)
The fish bonemeal supplies a little nitrogen and a good, but not harmful, dose of long-lasting phosphate; the fish blood supplies good levels of nitrogen, & the fishmeal supplies a decent level of potash.
It's only drawback is that it can attract predatory animals, who smell it & burrow to look for dead animals.