The R6 MkII's EVF is 1.6 million dot and its rear LCD is nearly 3.7 million dot, while the 5D's EVF is 2.1 million dot and it's LCD is 5.76 million dot. In both the EVF and rear monitor, the higher resolution might be helpful seeing fine details. For landscape photography and large prints, the 45MP R5 seems more ideal.
has a microphone input. Canon EOS R5. Canon EOS R6. A microphone port allows connecting external high-end or specialized microphones. has a socket for a 3.5 mm audio jack. Canon EOS R5. Canon EOS R6. With a standard mini jack socket, you can use the device with most headphones. has a stereo microphone.
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canon r6 mark ii vs 5d mark iv