Hard to tell by the pictures looking only at the date, but in the 1970-S small date, the word "LIBERTY" is usually very weak and that isn't the case in any of those pictured.
Here are the 5 facts about small date which make them distinguishable:
1) The "19" of the date is usually slightly weak.
2) "9" of the date is wider and more sharply curved.
3) LIBERTY is usually very weak.
4) Top of numerals of the date are level.
5) NO horizontal crease across the 7 numeral.
Just for comparison here are the 5 facts about large date
1) The "19" of the date is generally strong.
2) "9" of the date is narrower and more gently curved.
3) LIBERTY is usually about normal.
4) Top of 7 is lower than 9 or 0.
5) ALWAYS a horizontal crease across the 7 numeral.
Those facts are from the book "Looking Through Lincoln Cents, Chronology of a Series" by Charles Daughtrey in case anyone is wondering.