I want to start learning ARM and I found these in a store but I cant choose which should I buy:
Max Clock (MHz)
|Program Memory (KB)||SRAM (KB)||Programming method||Price (x10000 IRR)||Origin|
|NUCLEO F303RE||STM32F303RE||Cortex M4||72||512||64||Embedded ST-Link/V2||610||Original|
|Arduino DUE-R3||ATSAM3X8E||Cortex M3||84||512||96||Bootloader||335||Chinese Clone|
Looks like Arduino's processor is better than other one (except that it is M3).
I think Arduino in easier to use but if I buy NUCLEO, I'll have a ST-Link/V2 also which can be used to program all ARM and AVR Mega processors (and probably XMega in near future) by some magic.
Also, I think STM32 processors are used more than ATSAM.