They gave you pre-gen needles, not new-gen. Here's comparison and explanation on why they are that way:
1. aftermarket pre-gen needle
2. stock pre-gen needle
3. stock new-gen needle
4. aftermarket new-gen needle
Note that stock pre-gen needle #2 gets thinner sooner than stock new-gen #3 as needle lifts in high-RPMs. This coincides with pre-gen's tuning for high-RPM power with more high-end flow than new-gen (which is tuned more for low-end torque). Here's comparison of pre-gen vs new-gen's powerbands. Notice pre-gen's high-end power bump. The sooner and thinner needle transition at tip is to match this higher flow (#2 compared to #3).
Issue with factory new-gen is it has super-rich high-end with slightly lean mid-range in stock trim.
Proper needle to improve this fuel-curve is #4. Note that in mid-range, it's actually thinner than factory new-gen #3 to add mid-range fuel. However at the tip, it's thicker than factory needle to remove fuel from factory's super-rich settings.
If you use that pre-gen needle on your new-gen, it's going to transition to even more fuel in high-end compared to factory's already super-rich mixtures. You'll find you'll get stumble in 8-10k RPM range and slow lazy revving after that due to super-rich mixtures.
For optimum tuning, you need to schedule dyno time to get AFR curves for various configurations. Or get wideband O2-sensor.