I prefer Domi, so I don't agree. He is two years younger, RFA controlled for another two seasons, and has the ability to be much more. He's already shown what he is capable in the 18-19 season. I think the Rangers are built in a way that would maximize his potential.
Danault will be a 28 year old UFA next summer. He's a solid player, and perhaps he fits the type of player the Rangers should try and acquire, but the age and contract situation does not align well. It puts the Rangers in a position where they have to commit longer term to a player into his 30s, with little time to show he's worth it here, or lose him via UFA.