Quick Charge 2.0 or 3.0 portable charger for Note 4?

Hi everyone, So I have a question. I have a Note 4, which has Quick Charge 2.0 technology. I want to get a battery pack that makes use of this. There's an AUKEY 20000 mAh that's QC 2.0, and one with QC 3.0 that's only about $5 more.

Here's the AUKEY 20000 mAh and QC 2.0:
Quick Charge 2.0 AUKEY 20000mAh Power Bank Portable Charger with Lightning Input for Samsung Galaxy S7/S6/Edge, LG G5, iPhone, iPad, Nexus 6P & More

And here's the AUKEY 20000 mAh and QC 3.0: [Qualcomm Quick Charge 3.0] AUKEY Quick Charge 3.0 20000mAh Portable External Battery Power Bank Fast Charger ( 74wh /5V 9V 12V Support for Input & Output ) for Samsung Galaxy S7, S7 Edge and more

First, will I see a difference with QC 3.0 over QC 2.0 on my Note 4 that's decent enough for the extra $5? I mean, $5 is not a big deal anyway. Second, I'll want this for my future upgrade too, so wouldn't it make more sense to go with QC 3.0 anyway? Might sound like an obvious answer but I'm looking for something more substantive than "yeah it makes sense". My phone is battery hungry, and takes FOREVER to charge if I'm not using a fast charge enabled charger, so this is an important aspect to me as well (and considering I'll be sticking with Note or going to Edge Plus in future upgrades, this won't change).

Suggestions for a different portable charger that allows for fast charge are welcome (at least 20000 mAh though), or simply advice on which of these two are better (the price is decent, and I'm not willing to go much higher than these prices)

Thanks so much!

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