HI John,
MK10DX128VFM5 MK20DX128VFM5 is also 32 QFN, it has 128Kflash +32K flexNVM, FlexNVM also can execute program code, but the core clock is just 50Mhz, not like K02 have 100Mhz core clock.
K10 also have a small difference in pin to pin compatibility, eg, pin 9,10,11.
So, if you don't care about the core clock, just care about the flash size, you can consider K10,K20.
Wish it helps you!
If you still have problem, just let me know!
Have a great day,
Kerry
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