Rembrandt - Portrait of an Elderly Man (1667)
Moroni - Old man Seated with a Book (1570-5)
Rembrandt -Portrait of Margaretha de Geer (1661)This is the difference between a good portrait and an outstanding one. The other similarity is that as well as painting the more distinguished and aristocratic people who lived around them, they both painted more ordinary people.
Moroni - The Tailor (1565-1570)
It is a pity that Moroni did not appear to have done any self portraits. Rembrandt painted himself many times, and because of this one feels that one knows the man intimately.
They both also painted allegorical and religious paintings. It is here where Rembrandt is a far superior painter. These paintings are full of life, whereas the few Moroni religious paintings we see are rather stiff and not at all life like.
Both painters were very skilful in their use of paint, giving wonderful depth to the everyday objects in their painting such as feathered fans and books. Moroni is more academic, whilst Rembrandt is much more daring in his brushwork. The catalogue states that he was the first painter to apply paint with a knife, and if so this makes him a great innovator.
If you can, go to both exhibitions. The Rembrandt unfortunately will be very crowded, but the Moroni should be quite comfortable. Personally I prefer the exhibition space at the Royal Academy, where the Moroni exhibition is being shown, even though it is in the smaller Sackler gallery . How wonderful the Rembrandt's would be in the R.A.'s main galleries, instead of the cramped settings of the National Gallery's Sainsbury Wing.