imwrite or print

[Leonardo]

Hello, 

after

t = linspace(0,2*pi,100)';
plot(t,sin(t));
tic;print -dpng "-S560,420" fig_print.png;toc
tic;imwrite(getframe(gcf).cdata,"fig_imwrite.png");toc

I could not find any differences between both files (fig_print.png and 
fig_imwrite.png).

However imwrite is much faster than print

So, I have a few general questions about both commands

1) Is imwrite always faster than print ?

2) Is there any situation where one command should be used instead of the other 
one?

3) Is there any situation where the results will be different?

Kind regards,
Leonardo