NAD83 vs. NAD83(2011)

Hello. I was wondering if someone could explain why in the spatial reference properties list under UTM, there is a folder called NAD83 which has all of the UTM zones listed and then a little further down there's a North America folder with a whole bunch more NAD83 UTM zones in it. I understand that there have been updates to NAD83 over the years which has prompted revisions, but it appears from the specs beneath both are the same.

For example if I pick NAD 1983 UTM Zone 19N from the NAD83 folder I see this:

NAD_1983_UTM_Zone_19N
WKID: 26919 Authority: EPSG

Projection: Transverse_Mercator
False_Easting: 500000.0
False_Northing: 0.0
Central_Meridian: -69.0
Scale_Factor: 0.9996
Latitude_Of_Origin: 0.0
Linear Unit: Meter (1.0)

Geographic Coordinate System: GCS_North_American_1983
Angular Unit: Degree (0.0174532925199433)
Prime Meridian: Greenwich (0.0)
Datum: D_North_American_1983
Spheroid: GRS_1980
Semimajor Axis: 6378137.0
Semiminor Axis: 6356752.314140356
Inverse Flattening: 298.257222101


and if I pick the NAD1983 (2011) UTM Zone 19N from the North America folder I get this:

WKID: 102388 Authority: ESRI

Projection: Transverse_Mercator
False_Easting: 500000.0
False_Northing: 0.0
Central_Meridian: -69.0
Scale_Factor: 0.9996
Latitude_Of_Origin: 0.0
Linear Unit: Meter (1.0)

Geographic Coordinate System: GCS_NAD_1983_2011
Angular Unit: Degree (0.0174532925199433)
Prime Meridian: Greenwich (0.0)
Datum: D_NAD_1983_2011
Spheroid: GRS_1980
Semimajor Axis: 6378137.0
Semiminor Axis: 6356752.314140356
Inverse Flattening: 298.257222101

So it appears that these projections are the same. Is that correct??