I agree with all of the above, Malmsteen is an amazing player. However, I don't like his music, for me it lacks emotional input but there is no doubt the guy is a true virtuoso and has been a huge influence on other great players such as Romeo. I personally prefer Romeo, his technique is unbelievable and his music (solo album) is so much more listenable.
I don't like wither of their band efforts because of the horrible big hair with tight leather pants singing. Both amazing players, there is no "best" guitarist in world.