Just quickly, we know what you mean and MANY people say the same thing but technically
To answer your question, it will be very generally
Low Freq 125kHz
Great Flexibility - Less secure
the T5577 chip in our implants ( xEM, NExT, FlexEM etc), it can emulate many types of chips, and is a great chip ( Just not as secure as some others ) but select this hyperlink to learn more about T5577
But basically, it can have the chip type changed as well as the ID.
It is compatible with MANY LF systems
High Freq 13.56MHz
Some Flexibility - More secure
there is not an equivalent chip to the T5577 that can be “all” HF chips, but the FlexMN can do a few of them, and the Mifare 1K that we see in the xM1, FlexM1, FlexMT, is used with a large number of systems because it very popular world wide and has a changeable ID, but as far as HF goes, it would be the least secure, but convenient for us.
For more secure functionality, if it is utilised correctly, is something like the DESFire chips in xDF2 FlexDF and FlexDF2.
Sometimes a system may just look for an ID and if it is “talking” the same language eg. ISO14443A which Mifare and DESFire have in common, you could in theory use a “simple” Mifare chip on a
“complex” DESFire system.
HF can also mostly be interacted with on your phone via NFC
Data sharing, access control are 2 of the more common uses