@rashida Alas, I am no expert on answering your question. My basic understanding is that they can both offer benefits for bone health. Some people report reactions to MK-7 such as heart palpitations but that is not a common reaction for most, as I understand it. MK7 has a longer half-life compared to MK4.

If you search MK-4 and MK-7 on Mayo Connect, you may find others who can describe their differences better than I. Here is one such discussion:
https://connect.mayoclinic.org/discussion/mk4-vs-mk7-for-osteoporosis/
Then there are others like Dr. Doug Lucas who describes the K2s including Mk4- and MK7:

Or Margaret Martin:
https://melioguide.com/osteoporosis-nutrition/vitamin-k2-for-osteoporosis/
You can also do an AI search and probably get a nice summary of each one.