Sukhoi Su-11 versus MiG-21 how they do compare to each other?

I wonder how these two aircraft compare to one another? what are the performance and weponry standards in both aircraft?

Can we say the Su-11 is a big MiG-21? or was the SU-11 a somewhat more limited machine?

if the Su-11 would have been ever exported do you think if would have been as good as the MiG-21?