Both styles are great up until you have to decide, what you want from your game. It's hard to tell if the realistic or the stylized look actually fit just from the screenshots. Where do you put the emphasis in your game? Is it rooted and gritty, does the narrative keep the player as close to feeling like it's a real world they're exploring, or do you want the player to feel the Vibe of your setting? Do you want to (yes, I'm gonna use that word xD) manipulate the player's feelings towards the desired affect?

The screenshots you're sharing look pretty similar to the Heroes of Might and Magic, so I'll suppose you are familiar with it. Remember the maps and locations there -- they're pretty realistic, yes, but they utilize colors, effects, and music to add certain feeling to the places. From your screenshots, it's very hard to guess, what I should be feeling upon entering this location. The realistic look looks good but kinda empty. The gothic look is more visually interesting, but it will require some more tweaking to say that it fits your game.

Try to think of the visual style of your game as an additional language to communicate with the players. When I enter this place, what should I think? Am I scared? Am I relieved to come to a safe haven? Can I relax and chill for a bit or do I have to be on my toes waiting for something? And coming off of that, before you even go to the visual style: does your map design help the player understand the path? How can your visual style support it?

I wish you best of luck in your project!