A little later than Roma, with superb flavor in slightly rectangular-shaped fruits (3-1/2" x 1-1/2") that are bright red and hang in large clusters. Holds well on the vine and in storage. Extra-high solid content is perfect for canning. Indeterminate.

San Marzano Redorta - indet., regular leaf, larger roma type fruit, 4-5" long, great flavor. Very sweet. Noticeably larger than  regular San Marzano. At our second Tomato Day, everyone was commenting on how incredibly sweet this variety was.

http://tatianastomatobase.com/wiki/San_Marzano