Griffith's valuation was a taxation survey, which recorded the details of people holding property. The dates of the records vary depending on when the various townlands were surveyed, but in the case of the county Wicklow they are generally dated 1853 or 1854.
There are just 5 entries for the surname Carton in the county on Griffith's :
1. Ralph, Village of Laragh, townland of Brockagh (1854)
2. James, townland of Meetings (1854)
I believe that Meetings refers to the townland near Avoca also known as the 'Meeting of the Waters', and this is located just 13km south of Laragh.
The other Carton listings are, further away from Laragh/Brockagh, and dont seem as likely :
3. Edward, townland of Knockananna, (1853)
30km south west of Laragh and near to Hackettstown (Carlow)
4. Terence , townland of Balyknocker (1853)
50km south and not far from the town of Carnew
5. Judith, townland of Lower Kilcavan (1853)
also near the town of Carnew
I based the previous baptism search for Catherine on the clue that her father's name was possibly Ralph - and that was the only match around the right time. The RC parish on that possible match was Rathdrum which is the one immediately to the south of Glendalough RC parish (where Laragh/Brockagh is located). The location of the 2nd Griffiths record mentioned above (James Carton, townland of Meetings) would be in this parish, and very close to Laragh, so a connection seems possible.
To prove that the 1829/Rathdrum parish baptism is correct, you would probably need to double check for any details recorded on Catherine's marriage to confirm that her father's name is indeed Ralph.
Shane