looks like either will be ok
TI and Micrel are reliable manufacturers.
what voltage will you be providing to the regulator?
what is the maximum current at turn on or turn off?
if its battery operated, why are you using a regulator?
i suggest a 1 uF cap on the input voltage and on the output voltage
(unless the data sheet specifically says otherwise)
What about the AMS1117 3.3V ? I as well as many others sell them on eBay for not much money. As wwfeklman said it is important to use the manufacturer’s recommendations as to the input and output capacitors.
You didn't specify relevant application parameters except 50 mA current. How about the input voltage, expected quiescent current? AMS1117 has >1 V dropout voltage, no true LDO.