Binnie, in his first year up at the senior level, outgunned Trinidad and Tobago's Josh Pinard in straight games to capture the Boys' Under-19 title.
McCarthy had a tougher time landing the Girls' Under-19 crown, defeating Joanna Scoon of Trinidad 9-6, 2-9, 3-9, 9-0, 10-9. Scoon was also the runner-up last year.
In the Under-17 category, Bermuda's Robert Maycock improved on his semi-final showing last year to land the boys' title over Joe Chapman of the Organisation of Eastern Caribbean States.
Barbadian Cheri-Ann Parris celebrated another regional triumph when she dismissed Trinidad and Tobago's Tessa Martin in straight games for the Girls' Under-17 crown.
Parris, the Under-15 champion last year, stepped up to the higher category and ran past Martin 9-0, 9-5, 9-3.
In team play yesterday, Trinidad and Tobago beat Barbados 4-1 to place third in the group. (CMC)