I could live with either variety, but IMO the biggest difference would be the quality level that was chosen. Basically, a cheap door would end up being unacceptable to me in the long run, they just don't work as smoothly, seal as well, or maintain those attributes over time. Hinged does require interior swing space - that might be an issue. Sliding doesn't look or IMO can't be made to look like a formal door, where hinged can - you may want to maintain an outside look to your house. Swinging might be able to be made more secure using standard door locks, but is any door with a window secure?

As a minimum, whichever style you choose, I would go for the best insulating value (low U, high R value) and the lowest air infiltration leakage.

Space is the biggest issue. Hinged doors need a decent area to swing all the way open, whether they swing in or out, center hinged or jamb hinged, is entirely up to you. Sliding doors don't require any additional space to function.
many companies make attractive versions of both sliders and hinged doors, so look around.
I do agree that cheap is to be avoided. Buy the best product you can. You'll be happier in the long run.
Many companies today offer locks that can be re-keyed to match your other locks, if that's important to you.
Be sure to read the care & maintenance information for any product you research. Many of them recommend periodic adjusting to insure proper operation, which will increase the life of the product as well.
Good luck!!!

Is there a big difference in cost between sliders & patio hinged doors?

Interior swing space isn't an issue in this instance. I was thinking, however, that the hinged may allow more "open space" for moving things in and out. The available open space on my current 6' sliding door is about 33"... which isn't too wide for moving in beds, couches etc.

Why would hinged doors be more secure than sliders?

Many hinged patio doors offer a multi-point locking system, while sliders tend to have a single locking point. Some sliders now offer multi-point hardware, so it's less of an issue now. The double hinged doors will give you a much better clear opening, with either hinged screens or the gliding screens removed. The double hinged units will cost more than the sliders with the same options, but if it's a big opening you want, you can't beat them.