I am kind of using both, or better: testing that.
But to me ‘keywords’ strictly related to photos, where this is used as term, and where there is in effect a separate metadata system attached to photos, and available in all photo managers etc.
Afaia, DT is using the keywords field to map this system within DT (– but granted, the real mapping of underlying metadata-mappings is not officially documented, afaik; see here as well).
Then, often keywords and tags are simply mixed up in different context-/app-specific contexts, or even used interchangeably. so, that a) often sows confusion; b) makes it harder to discuss the issue.
So, given all that, I think it´s good to
- first clarify on your side, in which way you are taking up ‘keywords’ as parallel system of use her
- spell out what you want to achieve, or what you thinking around this is/implies.
Generally, I´d always say, any duplication and multiplication of such meta-systems should be considered w/ care, and multiplication of (personal) sorting/ordering systems should at best kept to minimum. Otherwise you are just confusing yourself, or inserting a lot of ‘cognitive cost’ down the line… jmo.