Any jetting spec we throw up here will just be a starting point.
Both needles are the same profile. One is a touch leaner form closed to 1/8th throttle or there abouts - the area where it overlaps with the slide, pilot, and air screw.
A 175 main is likely ok. Given your cooler temps I'd go towards a 178 just because a little rich never hurt anyone. The needles suggested don't supply as much fuel towards WOT as the current N1EF.
Essentially you'll end up with similar top end mumbo, and a leaner more responsive engine at smaller throttle inputs.
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