Iphone 8 case same for iph7?

I bought iphone 8, before one month. When i wanted to buy case in the store insay that i need iph8 case. They said to me that is the same case for iph 7 and 8..

So i was in worry i bought new phone paid it lot of money so i thiught, lets buy case which i can find just in case the phone dropped i couldn not afford new one.

I bought this case, it is elegant, small, not too thick.

I was thinking, this is too thin if i drop my phone the glasa wil break so on Alixepress i bought “iphone 8 case -rock” i was thinking oh yeah rock i read this is really secure accident-free mask.

And guess what, when i opened the package it says “Iphone 7 mask” wtf hahaha. The dimensions of iph 8 and 7 are not the same, iph 8 is thicker because it has glasa on the back. Which makes him little havier.

This is the tird case, second i have ordered online.
At least they make effort and write that is iph7/8 case haha.

If you ask me which mask i prefer it is the rock mask, second pitcure, i am more secured if the phone get dropped.. But it has lack of elegance.