I am not surprised by your test results at all Jerry.
Firstly to me I would break BIR curries into categories of curry
Sweet
Sweet and Sour
Sour
We have two totally different sauces here Saffron and CurryTester.
The CurryTester is purely experimental and if you remember I described the cooking procedure as a method of releasing the natural sugars from the carrots and onions.
Now I would describe the two bases and have in previous posts - currytester tastes sweet and silky and rich whilst for me the saffron tastes sour and coarse.
Also you made your favourite curry which is a madras - I would class madras, vindaloo, tindaloo, phall, basic curry all of these curries in the sour category.
I would say that the best sauce for these would be the saffron or rajver or one of the others.
Now I just happen to love Patia - hot,sweet and sour but also quite rich
I made the patia again last night - I made three screwups in the cooking process but it was still better than all takeaways that I have tried in last couple of years
By the way the three screwups were - I added the chicken wings to the cubes to pre-cook - you must cook the wings separately otherwise the cubes overcook.
You must add boiling water to the chicken - blanches it and helps to retain moisture
and forgot to fry the mushrooms.
I think the currytester sauce complements the sweet and sweet and sour dishes perfectly. I will try a CTM over the weekend to see if it provides a similar result to the patia - but i am confident it will.
Now back to the base
Ghee - I used a lot of Ghee basically overall it was 250g or 1/2 lb butter - for the cost conscious amongst us this added a ?1 to the overall cost of several curries.
This was purely an experimental base and experiments are for us all to learn from.
One unexpected result that came about was the lack of separation of the ghee at the second stage of cooking - it didnt come to the surface in the same way that the veg oil does. This meant it couldnt be skimmed off and set aside.
Next time I make the base I will reduce the amount of butter by half as I think this will still provide the "taste". I will not be changing the veg mix as both Jerry and I found the consistency to be correct nor will I be changing the spice mix or the overall cooking method.
What I actually believe is that purely by accident we have found the second base sauce that the best BIR's use suitable for making your Patia, CTM, Tandoori Chicken Massala, Salia, korma and Passandra.
I was planning on further confounding the experts by using different vegetables and producing a different "soup mix" but I am that pleased with the result myself in that I have achieved my required taste for the type of curry I like the most I feel that any further experimentation will be wasted.
I am now going to go through the various curry recipes one by one over the next few weeks and test the taste the different bases make. I will report back later