Help choosing between 3 portable chargers

#1

What are the differences between

  1. https://www.anker.com/products/A1264011
    PowerCore 10000 with Quick Charge 3.0

  2. PowerCore Speed 10000 QC
    https://www.anker.com/products/A1266011

  3. PowerCore+10050 with Quick Charge 3.0
    https://www.anker.com/products/A1311011

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

Extra:
I have a Galaxy S7 Edge

#2

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 Amazon.com here: https://www.amazon.com/gp/aw/d/B01JIYWUBA/ref=psdcmw_7073960011_t3_B01MRR9OWB 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.