How do I pixels?

gistfile1.c

    CGColorSpaceRef cs =  CGColorSpaceCreateDeviceRGB();
    CGContextRef bmContext = CGBitmapContextCreate(NULL, width, height, 8, 4 * width, cs, (CGBitmapInfo) kCGImageAlphaNoneSkipLast);
    CGContextDrawImage(bmContext, (CGRect){.origin.x = 0.0f, .origin.y = 0.0f, .size.width = width, .size.height = height}, imageRep);
    CGColorSpaceRelease(cs);
    
    RGBAPixel *pixels = (RGBAPixel*)CGBitmapContextGetData(bmContext);
    
    // Outputting the first 10 pixels on different hardware (iPad Air, iPhone 5, Simulator) gives slightly differing pixel values.
    
    // I am confuse.

It's most likely because these devices all have different color spaces/profiles.