Is the quality of pictures and videos saved in my phone's cache the same quality as the ones saved on the micro sd? Cause the ones on my phone look like crap...

Nope there is quite a Big difference in the SD ones Vs cache ones

chached ones are much lower quality as its the live stream of the drone vs record

Just urge you strongly to read the manual. Look on your question I assume, that you don't know many essential things about your drone and among them may be some vital topics that can save your property and nerves. And first of all read this: https://www.spark-help.com/tips/prevent-a-crash-or-flyaway-with-your-spark.41

Hope you won't think that I teach you how to live. I just want to be helpful.
Have a nice day.

Hi, thanks for the inquiry. Since the videos/photos in the mobile are cache files which will require a small amount of storage, the quality of those files are not the same as on your SD card. The original files are always in the SD card. Hope this information would satisfy your concern. Thank you for the support.