Outdoors, I think organic is better for the planet. Probably a bit easier to grow too. At least if growing in the ground.
Better for the environment. Both in it's carbon footprint and it's use of carbon. Supports more life.
There's only so much elemental phosphorus left in the world too.
And, like a lot of Hydro growers, you're not necessarily tipping waste straight down the drain, growing organic indoors.
But for me, the ball stops there when growing indoors.
One could argue indoor organic has a larger carbon footprint than it's hydroponic counterpart, because of all the weight.
All those truckloads of heavy soils, earth and rich organic matter, getting carted around the globe, has to burn more carbon. Hydroponic media is much lighter in weight.
Also, some pretty bad practices environmentally, like Sea Bird Guano.
Makes no difference in taste, or quality of product in my own experience. And, hydroponics is more practical indoors.
Though truthfully, when outdoor organic goes right and you get a good harvest, it's a better kind of feel good, I reckon.
More satisfying placebo.
But like all placebos, it's probably just me.
Imho, organic gardening is about using the immediate environment you're in. And, making use mostly of what's around you, instead of getting it from somewhere else. It's about sustainability first and foremost.
Whilst Hydroponics is just mad fun.
Organic Outdoors / Hydroponics Indoors.
Way to roll.
If I had to choose and could, it'd be solely outdoor. But that's personal choice.