Svava
Djento ergo sum
would you say the difference in sound to a JP7 with basswood body, regular maple neck and rosewood fingerboard is big or is it barely noticeable?
Noticeable for sure but not jarring.
The difference between say a JPXI7 and a JP 13 - 7 would be huge. You're swapping body woods and pickups and circuitry and whatever else.
In this case you're keeping all of the electronics the same and you still have the same tone block so a lot of the vibrations will be similar.
As far as I would guess I think you can expect a bit more brightness, tightness, and sustain from this configuration while sacrificing a bit of warmth and depth.
You will still have that signature JP sound- they all have that.
Take the others' advice over mine though- I'm not as experienced