Milan Hutera
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These are two different kinds of filters.
Baader Neodymium Moon & Skyglow or Optolong L-Pro let in very broad spectrum of light except selected bands of light - for example some of the green/yellow spectrum that naturally occurs even on dark sites. These are all around fantastic filters for Galaxies, Star Clusters and even Nebulae.
On the other hand, IDAS NBZ is a dual bandpass filter which ONLY lets in specific wavelenghts of light - most likely Hydrogen alpha (656nm) and Oxygen III (approx. 500nm) and BLOCKS everything else (sort of). These are pretty much useless on galaxies (unless you want to capture the nebulosity in thoses galaxies and combine them with broadband data to get the nebulae a boost), reflection nebulae or star clusters such as Pleiades. They are FANTASTIC for nebulae which contains the specified gasses and block much of light pollution and Moon light. If you shot a Monochrome camera with a dedicated Hydrogen alpha filter, you can get useful data even uder a full Moon.
Be warned though, that filters with tight bandpasses (I'm guessing IDAS NBZ has a 7nanometer bandpasses) pretty much require modified filterarray in front of the sensor, guiding and a cooled camera, since you can easily go 5 or more minutes even under light polluted sky.
There is a misconception that you don't need a narrowband filter under dark skies, which is totally false. There is a massive difference in rendition of Messier 1 in broadband and narrowband. I can post samples later from our darkish sky.
So if you don't want to throw a lot of money into this black hole, buy a Baader Neodymium Moon & Skyglow, which is quite cheap and works nicely even with stock cameras (it did work nicely on my ancient 40D...).
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