Yes and no, it depends. In terms of value, the bundle is better. But if you only want a specific asset, then of course it’s better to just get that one.
The Humble Bundle includes a lot of assets and music that we don’t usually offer together anywhere else. It’s a complete pack for creating any kind of 2D game topdown or platformer. Unless you’re looking for something extra, you probably won’t need anything else to make a full game. You can download the whole humble bundle assets from the page right now, just go to downloads right here.