Which CECT Mini iPhone is Better - i9, M188 Or P168S?

I like to research, use, and report on the iPhone clones. Recently, the smaller or "mini" models have become very popular. Often, I'm asked about the "mini iPhone clone." I often have to ask a few follow up questions to determine which model the person means. Most often, they are either asking about the CECT i9, the P168S or the very small M188. I'll go over some of the features of all of these