ERA armor question

[Wdll]

Some units have some pretty low numbers as ERA armor (for example 2 or 3). Do they actually protect the vehicle from destruction by anything that regular armor wouldn't, at this low level, in the game?
Especially in cases where the vehicle is not exactly a MBT class of armor.

[DRG]

Single Digit ERA numbers indicate early first generation ERA, any two digit number with a 1 in front is advanced and yes it does protect better than bare steel

Don