Help choosing between 3 portable chargers

What are the differences between

    PowerCore 10000 with Quick Charge 3.0

  2. PowerCore Speed 10000 QC

  3. PowerCore+10050 with Quick Charge 3.0

In my opinion i can’t find much differences between them. They are all QC 3.0.

I have a Galaxy S7 Edge

Depends on what you want. The first one is an OG generation PowerCore, last one is a PowerCore+ model with an aluminum case. The middle one is the latest generation PowerCore Speed model, and best buy, available directly or from here: for $24.99

Frankly the specs for all three are similar, but you would expect the one I showed to be the latest technologies combined with the latest parts.