using this command you can get the default figure position using get command
>> f = figure(1);plot(0);a = get(f,'defaultfigureposition');
a is in your case is the first output
later using f.WindowState = 'maximized'; you are changing the state from 'normal' to 'maximizied'
And displaying the changed position. This is your second output.
I would recommend you to use following command:
This will display the all the properties specific to the figure.
I hope this helps.