What is better to use, FeRAM or MRAM? Why?
It seems like the only disadvantage of MRAM is more power for writes.  Unless things have changed, write speed is faster on MRAM and there is infinite endurance, unlike the limited number of cycles for FeRAM.  The issue is if MRAM can get into the main stream and get anywhere close to Flash as far as cell size.  Without the same yield, prices can't be competitive.  That drives most things.