I'm not sold on using a Pataks paste in a homemade traditional curry. It might be ok but why not do your own pastes, basically a spice mix, cooked with either water and\or vinegar and topped up with oil, sealed in a sterilised jar.
I found the ones bought in the supermarkets very salty and not much flavour, ok'ish but not what I'd use if i was doing a traditional curry. I have no idea about the merits with BIR as i'm still learning BIR style and have enough to learn than use these pastes