Using HD IP Camera In SD Mode?

Dear IPVM members,

From your experience on testing new IP cameras, do you notice an improvement in using new high resolution cameras (2MP, 5MP…) in term of quality/bandwidth/low light performances when using these cameras in standard definition mode?

In other words, if I have no specific needs in high resolution cameras do I need to still use SD camera or it is a better choice to use brand-new high res cam as they are better even in SD mode (better image quality, better encoding efficiency…).

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