What is the difference between the HyperDrive DUO versions?

Ports	Kickstarter HyperDrive	HyperDrive DUO	HyperDrive DUO 2020
Model	GN28A	GN28B	HD28C
HDMI	Max 4K/30Hz HDMI	Max 4K/30Hz HDMI	Max 4K/60Hz HDMI
40Gbps USB-C	Max 5K/60Hz Video 40Gbps Data 100W Power Delivery	Max 5K/60Hz Video 40Gbps Data 100W Power Delivery	Max 5K/60Hz Video 40Gbps Data 100W Power Delivery
5Gbps USB-C	5Gbps Data No Power Delivery	5Gbps Data 60W Power Delivery	5Gbps Data 60W Power Delivery
Micro SD	Max 104MB/s Micro SD partially exposed	Max 104MB/s Micro SD fully inserted	Max 104MB/s Micro SD fully inserted
SD	Max 104MB/s	Max 104MB/s	Max 104MB/s
USB-A	5Gbps Data	5Gbps Data	5Gbps Data
USB-A	5Gbps Data	5Gbps Data	5Gbps Data
Design	Flush with MacBook Pro	Flush with MacBook Pro	Added grip for support*
Use with a thin case?	No	No	Yes (remove grip)

*The grip will not allow the MacBook lid to close