We know Jannah has many degrees and rewards vary accordingly. My question is: within the same degree (e.g., both in al-Firdaws), can individuals still have different ranks and rewards? Is there proof in Qur’an or Sunnah that one person may be above another even inside the same level?

Ustadh AbdulAziz al-Haqqan
Allah knows best, I don't seem to recall anything regarding this