Unity 5 Resources.LoadAsync on Android slower than iOS?

Hi,

I've been using Resources.LoadAsync to load a gameobject at runtime in the background. The object has children gameobjects and those children are referencing .asset files.

1. On iOS, it takes 2 seconds to load that object on an ipad air 2.

2. On Android, same object takes 10 seconds and a lag at the end when req.asset is accessed. This happens on Nexus 9, Galaxy S6 or any other fast or slow android.

My questions are:

1. Why is it slower on Android? Is it a game design issue that I have to change? or is this a Unity regression?

2. Do you recommend using asset bundles instead of Resources.LoadAsync? I've seen a post here that mentions LoadAsync is also slow for AssetBundle on Android.

I'd appreciate it if someone could confirm the issue or point me in the right direction.

Thanks!