Which way up does your iPhone land when you drop it? Is it like a piece of toast, always on the buttered side (that is, the glass side)? I don’t believe in semi-intelligent selection of this nature. In theory, the phone can fall on either side, even though it does always seem to fall on its face.
I was reminded of this recently when I tried an alternative to Apple’s own Silicone Case. The Belkin “Classic Wallet Folio Case” was an inexpensive plastic folio that encased the 6-Plus but allowed the device to be propped up for reading. It worked well but had some hidden problems.

In the nine months I used the iPhone 6-Plus with Apple’s silicone case I didn’t drop the device once. The silicone case (as opposed to the Apple leather case which I rejected as too slippery) is less liable to slip out of the hands. And it didn’t
After buying the Belkin case, made from a rubbery but smooth and rather slippery plastic, I have dropped the phone twice. This could just be unfortunate happenstance, but I have a theory that the Belkin case is more droppable than the Apple silicone backing.

Worryingly, too, on both occasions I dropped the phone in its Belkin folio, the cover sprang open and acted as a sort of parachute, ensuring that the phone fell slap on its screen. First time was no problem, second time, despite the screen protector, there was a slight crack on the glass. The Belkin case does not have a raised protective rim to minimise risk to the screen and, worse, the folio design seems to ensure the phone falls face down.
Although I liked the ability to prop up the phone in the Belkin case, I am now back with the Apple silicone back case. Even if I do drop it, which seems less likely than when using Belkin’s slippery design, the protective rim around the screen helps prevent serious damage.
Common sense tells us that a case with a flap, as the Belkin folio, is going to provide better protection than a simple back case that leaves the screen naked. But this isn’t necessarily so. The Apple silicone case, with its raised lip around the screen, might actually provide the best protection. It all depends which way the buttered toast falls.
That is one of the Apple devices that were returned to the shop within the fourteen day period Mike.
I just couldn’t get to like the 6+ and I also had a silicone back which went back even quicker… peculiar chap that I am, I could not stick the phone to my car dashboard’s patented `"blu tack" mount… So I first returned the back and exchanged it for a "Power Support Air Jacket for iPhone 6+" and then I sent them both back with the idea of getting a 6… As I was restoring the 6+ to factory settings, I heard that a new iPhone was coming in September, and I just reverted to my 5, with a new "Air Jacket" to fit, and I haven’t changed, simply because I like the size, it fits my hands and is unlikely to drop (either side down), even though I have a tempered glass protective screen fitted.
This is one of those things that like the Leica, I don’t want to change very often.
I was a victim of consumeritis… The good thing about Apple is that they allow one to indulge in such infections… The fourteen day "no quibble" return period being a wonder of the modern world.
Eleventh Commandment: "Thou shalt wait until September every year for thy new iPhone or tablet"