Based on my read, I disagree with raising action. The percussive effect the OP wants comes from the strings making contact with the frets, which requires more effort when action is higher.
I think it's one or both of:
- The strings on the OP's bass are very dead, to the point where they no longer provide sound output that the OP wants. Easy fix, new strings.
- The OP is mistaken about the neck relief being the same on the two basses. I mention this because a) a bass with more neck relief will result in less string-to-fret contact than one with less, effort constant, and b) the OP is offering an extremely specific measurement on neck relief at the same time he is demonstrating a lack of understanding of several other aspects of how a bass makes sound. No offense intended but I'm not sure I believe he has both basses with .008 inches of relief.
I think it's one or both of:
- The strings on the OP's bass are very dead, to the point where they no longer provide sound output that the OP wants. Easy fix, new strings.
- The OP is mistaken about the neck relief being the same on the two basses. I mention this because a) a bass with more neck relief will result in less string-to-fret contact than one with less, effort constant, and b) the OP is offering an extremely specific measurement on neck relief at the same time he is demonstrating a lack of understanding of several other aspects of how a bass makes sound. No offense intended but I'm not sure I believe he has both basses with .008 inches of relief.