I have the Irish cream and milk and honey. I only have tfa double ry4. On the second one I only have the pudding base. I ordered a bunch of nut flavors a couple orders ago but somehow skipped over the pistachio.
To be honest I almost subbed JF Double RY4 with FA RY 4 but then decided to try it as written. Since I have no notes on this recipe I also wonder if the original called for 3% and not 4%. 4% is my norm for RY4s so if a recipe calls for less I will up it and if it is more then I lower the percent. Regardless I find this a nice after dinner or with morning coffee vape or any time of the day
There is nothing wrong in subbing the pistachios although it will be a different taste.