As a side note, resize quality showed no difference on B4A, while it actually improved a lot in B4i, compared to native ImageView which was populated with xui.LoadBitmapResize
You are seeing two different ways to scale down the image. By default, B4XImageView keeps the original image size and lets the native ImageView scaling feature. In this case the scaling of B4XBitmap looks a bit better.
You are free to use it: