Turned out I was able to do it using AOMIE Back upper. Made a disk backup of the 7610, made a special usb boot disk with AOMIE and booted into it on the 7620, and then restored the backup (which I stored in another USB drive and connected to the 7620 as well...had to add some drivers during the WinPE boot disk creation so it could be recognized). They have an option called "Restore to Dissimilar Hardware" (I call it Magic). Booted up with zero issues! Then ran Windows Update and Dell Update just to make sure all correct drivers were installed and up to date. I always dread moving to a new machine as between work as a programmer entrepreneur, and hobbies involving photography, videography, and other tech tinkering, it takes days to weeks to setup a new computer. With this solution, it took me about 3 hours. Couldn't be happier!
Dell has sent me a 7620 to replace my 7610 due to unresolvable touchpad issues. Being so similar, can I just take my SSD from my 7610 and put it into the 7620 so I don't have to spend days reinstalling and configuring a new system? I had cloned my 7610 to a new Samsung 980 Pro, and put that into the 7620 and it wouldn't boot (Inaccessible Boot Device error) . The drive was recognized in the BIOS.  I'll try to use the actual 7610 SSD next, but just wondering if there is any reason that a cloned 7610 SSD wouldn't work in the 7620.
Put Hard Drive from 7610 into 7620?