I don't know about these Ibanez basses and the specific pickups and electronics they use, but I have a Warmoth bass with a P/J configuration.
First, I put these Barts in it:
8SU and 9J-L1
To be fair, they are "vintage" voiced and described as "warm".
They didn't do anything much for me.
I swapped in these Nordstrands:
NP4a and NJ4SE
And this bass came to life like a monster.
Now, does Bartolini have a more lively set of P/J pickups? Probably. So it's a case of apples to oranges for me, but I have Nordstrands in three of my basses now and, moving forward, that's all I'm going to use.
First, I put these Barts in it:
8SU and 9J-L1
To be fair, they are "vintage" voiced and described as "warm".
They didn't do anything much for me.
I swapped in these Nordstrands:
NP4a and NJ4SE
And this bass came to life like a monster.
Now, does Bartolini have a more lively set of P/J pickups? Probably. So it's a case of apples to oranges for me, but I have Nordstrands in three of my basses now and, moving forward, that's all I'm going to use.