Reddit reviews Spigen Rugged Armor Xiaomi Mi A2 / 6X Case with Flexible and Durable Shock Absorption with Carbon Fiber Design for Xiaomi Mi A2 / 6X (2018) - Black
We found 2 Reddit comments about Spigen Rugged Armor Xiaomi Mi A2 / 6X Case with Flexible and Durable Shock Absorption with Carbon Fiber Design for Xiaomi Mi A2 / 6X (2018) - Black. Here are the top ones, ranked by their Reddit score.
Resilient Shock Absorption and Carbon Fiber DesignFlexible TPU case with interior spider-web pattern & Raised lip to protects screenAir Cushion Technology for shock absorptionTactile buttons for solid feedback and an easy pressXiaomi Mi A2 / 6X Case Compatible with Xiaomi Mi A2 / 6X (2018)
https://www.amazon.co.uk/Xiaomi-Spigen-Original-Protection-Absorbent-Black/dp/B07D3NLN78/ref=mp_s_a_1_3?ie=UTF8&qid=1537725900&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=xiaomi+mi+a2+case&dpPl=1&dpID=41YYAOPMXwL&ref=plSrch
This is the case I have for my Xiaomi A2 and it holds up pretty well. Also Spigen is quite a good company for protective cases
My sister got the following cover for her Mi A2
https://www.amazon.de/Spigen-Elastisch-Stylisch-Handyh%C3%BClle-Schutzh%C3%BClle/dp/B07D3NLN78/ref=sr_1_3?ie=UTF8&qid=1538745829&sr=8-3&keywords=xiaomi+mi+a2+cover
I wouldn't recommend the 2nd of your options, the plastic back will break very fast.