Only cooked about 5-6 curries with JB's base so i can't say but Taz's base is so simple to make and you can really get the spices and base down to a very thick paste, i have tried nearly every recipe posted on here for the Taz base and have not been disappointed.
Here's a couple
Murgh Makhani using Taz base and recipe by Stephen Lindsay

Chicken Bengali by Stephen again
Here's a couple
Murgh Makhani using Taz base and recipe by Stephen Lindsay
Chicken Bengali by Stephen again