I'm not coarse or low porous, but here's my thoughts in mousse.

I had some success with it in my pre-CG days. Specifically with matrix Curl.life foam.

My thought process back then was that if I got as much moisture out of my hair as possible (literally wrung it out with a bath towel), I could scrunch the curl back in, and using a foam would be lighter and not weigh it down.

Towards the end I was realizing I got better hold with a glaze, while still being light.

I think now with my new found hair knowledge I realize that I NEED that wetness to form the curls, and I NEED the oils and a gel to hold in moisture, etc. I think my hair finds some mousses to be a little drying, and it just needs MORE. My hair is a sponge, and it takes SO much mousse to make a difference. (Especially since it's obviously mixed with air!)

So in MY mind it would seem like mouse would work BETTER for a coarse curlie, simply bc it's not going to suck up all the product.

But others with personal experience are going to have weigh in and help you more!
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.

Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing