Hello JT,
I've not used either of those filters and there is no spectral transmission data for either filter in the ebay advert so it's hard to comment, beyond that I think that they're probably no more than a neodymium or didymium type filter which blocks some light pollution bands, but typicallly nowhere near as much as the typical astronomic broadband light pollution filters which don't seem to be available in those (photographic lens) filter sizes.
Something which might help, which I have tried is a Hoya Red Intensifier (Red Enhancer) Filter or stronger still a Marumi Redhancer filter. They are both quality filters, but i prefer the Marumi. I've attached the filter curve for the Hoya Red Intensifier and a link below. Tiffen and Crystal optics are also quality brands that make these filters.
The Marumi is much better at removing the light pollution and extracting the stars - see composite image below chosen because of the challenging lighting: made at full moon, with street lighting illuminating the treetop 20m away as well as other general lighting. I don't recall exposure I used maybe 30s f/2.8 on a 24mm Nikkor. Left to right In the Image: NO FILTER, HOYA and then MARUMI
https://www.lonelyspeck.com/hoya-int...rophotography/
BTW I know you've opted for screw on 77 and 82 or 100mm square types, but what about a clip in filter? - The type that clips in to the camera body between the sensor and lens. Is your camera a candidate for that?
Best
JA