microchip pic18f: What is the difference between a POR/BOR and other resets
The information is there, but the datasheet does a poor job of explaining it. For example, TRISA has this:- 


Above each bit name the -1 (described as -n in the legend) means that bit will be a 1 at power on. No separate values are shown for other resets - so we must assume that they are the same... 

Looking at LATA we have this:-

   

The -x/u means indeterminate ('x') at power on, and unchanged ('u') on other resets. But the legend is deficient because it doesn't tell us what 'u' means. 

Table 5-2 only shows the values for Power On and Brown Out Reset, so clearly the statement that it "identifies differences between POR/BOR and all other Resets..." is wrong. Also RCON and STKPTR values are not the same for both POR and BOR. 

Datasheets for older PICs have clearer descriptions of the reset conditions. For example, here is PORTA on the 18F452:-