Disclaimer: there is no factual or scientific basis behind these statements

• sainsburys beans are neither too rich nor too soft nor too firm, and are generous with a good consistency of sauce that isn't too watery or viscous. my favourite choice.
• M&S are rich, very good.
• Co-op and Tesco are similar to each other. solid choice.
• heinz feels too sweet - it's fine otherwise.
• euroshopper / other value beans are good but a little bland and the sauce can be slightly watery.
• tesco reduced sugar beans (or any reduced sugar beans) has a weird flavour.
• branston beans are too firm, and the sauce is too thick. very unenjoyable to me.