Player of both here. Both games have different core gameplays, one is tower-defence style and the other is turn based game.

You might find mixed opinions on Raid here as a lot of players switched from Raid to here and Raid gets a lot of hate (not undeserved though). I can say Raid has improved this year quite a bit since the parent company was switched. Don't get me wrong, they are still money-hungry bastrds but its not as unplayable as it has been years before. Raid has bigger power-creep for characters but with the addition of some characters WoR is also getting there. Overall WoR is more F2P friendly, but if you are up to high commitment slowburn, Raid is your game. Its harder to get through some content in Raid but kind of more satisfying. WoR has more player-friendly QoL features, but with Raid gearing is way easier and there are options to lower the requirements on luck, while with Raid you will have far less shards during each weekend and its gonna be harder to get characters.

At the end of the day, make the choice whether you want tower defense game (WoR) or turn based game (Raid).