NFC has a number of uses, as an example
So if you want something like that, the NExT would be the better choice.
The xM1 can do that BUT as Amal mentioned above, it can only share it with Android, which is fine, especially if you have an Android and want to share (shortcut) those files with yourself
The xM1 allows you to change the (N)UID, which comes in handy in a variety of situations and is compatiblewith a lot of products.
Im not sure what you mean by the old version…
The decision between those 2 implants is a very common question, and comes down to what you want to use it for.
For me personally, I had a NExT in my right hand and an xM1 and xEM in my left.
Dont underestimate the power of the xEM (also in the NExT)
Follow this link to read up on the T5577 chip that is in the xEM and NExT
You will find a lot of older /cheaper lock systems, will be compatiable with the xM1, bit if not, it will likely be compatiable with the xEM
HOWEVER, after all that
To help you make your decision
I dont believe it will be coming back into stock any time soon.
There is a project for an alternative, but I cant give you a date for that…
The NExT is a great implant, and frequently the implant that takes the “V” card of many non-cyborgs
You won’t be disapointed.