Depends which of the D flat consolations you're playing.
In my opinion, Chopin's nocturne op. 9 no. 3 is waaaaaaay more difficult than Liszt's Consolation no. 3. So, if you think you can accomplish both of them and to a very high level, than I think the Chopin Nocturne would be more impressive. But if I were you, I'd choose the one you like better.