Sonys newest additions to its smartphone line, its flagship Xperia Z2 and budget-focused Xperia M2, both uphold the glass-encased design that Xperia users have become familiar with. At first glance, you wouldnt notice any difference between the Xperia Z2 and M2. The only noticeable physical difference is that the Xperia Z2 feels slightly heavier at 5.5 ounces compared to the M2s 5.2-ounce body.