Hey @Pixl, welcome
So it seems you have pretty good understanding of your needs/use cases.
I do have the same combo NExT in p0 on my left hand and xMagic on my p0 on my right hand.
So to your questions. I use the NExT for data sharing - I keep my emergency medical information there. The lf side I use for access control of a garage at work. xMagic, same story I have NDEF setup there(because I do not have a real mifare lock). LF side I use for the access control system of the building where I am living. You can use the UIDs of the chip with something like KBR1 or unloki to either set a password on your machine same as the UID, or in the case of unloki, associate a password to UID, so when you scan your chip the device emulating a hid device will type your password.
There are plenty of projects you can play with. Like drawer locks using UIDs, car immobilisers etc etc
For the desfire case you may want to look at flexDF2.
So should you get both at the same time. It is possible but bare in mind that the x series aka the glass implants do not have a anti migration coating and they may migrate to the place with the smallest resistance under the skin. Chance for this to happen increase as you do physical activities.
Which to get first, well the one you need the most. If you like to unlock doors with xMagic, go this route, if you like to be cool and share stuff, go this route.
5 Likes