We get our hands on the Xperia X Performance at MWC 2016, a phone that will likely never make it to the UK but still packs specs worth talking about. Under the hood lies a Qualcomm Snapdragon 820 processor, 3GB RAM, waterproofing and a 23-megapixel camera. The brushed metal back and 3D glass is a departure for Sony but we’re liking the X-series in-spite of the fact we aren’t entirely sure where it fits in relation to the Z-series. What do you think? Z or X?