The wallet style look better but may be a faff to hold (folding the door back) while answer the phone or using the camera?
The flip down (second link) are ok but the top flap can dangle down when using the phone. I got a version
like this where there's no flap in the way when it's open... but I paid £3 on ebay and wouldn't think it's worth £8 as it currently is.
In the end I got fed up with the extra bulk of the flip case and now use it in an '
S Line' gel case and take my chances with dropping it. Ideally I wanted to buy the Motorola flip case that is listed above by JurassicMark but when I got my Moto G (original 3g version a year ago) I couldn't quite face paying £18 which was the going rate back then... but it is the best looking and slimmest flip case as it replaces the back cover unlike most other cases that you insert the phone into.
One problem is that even if you buy the same item from the same seller you get different versions, I've had several S Line cases and they're all different, some good, some bad.