The most significant factor in the "Enhanced vs. Legacy" debate is the modding scene.

Spells and torches cast real-time shadows. Ambient Occlusion: Adds depth to corners, grass, and ruins.

Tie (with a nostalgic lean to Legacy).

The Anniversary Edition is free on Steam/GOG for existing owners. There is zero reason not to upgrade. You lose nothing and gain stability, resolution options, and a loot filter.