why instrument 7.3.1 cannot capture texture allocation on iphone6(9.3.2)? but It works for iphone5c(9.3.2)

I mark two generations for both iphone5c and iphone6 in the same game stage.

The 1st image tell us generation B allocate 163.55MB including 92.46MB textures.

However, on 2nd image only capture 79.65MB, all allocations are almost the same except GFX Texture Level.

Is there anyone can tell me why?