Our intention with RDR2Mods.com is to be more developer and community focussed, we have resources dedicated to RDR2 modding which are both community contributed and also some knowledge based on our own discoveries during development of our home-grown mods (like LML, RDRFR, etc). We like to think we're a bit more open too, for example, downloaders do not need an account to download mods from RDR2Mods.com. We understand this has both its postives and negatives though.
I'd personally recommend you check both, that way you don't miss anything 😄