The Red Devils' only loss this year was a 55-48 upset at Willingboro (19-3) on Jan. 23.
In the rematch, Moses, a 6-foot-1 forward, had 26 points, 13 rebounds, 5 steals, and 2 blocked shots.
RV (22-1) jumped out to a 9-2 lead that grew to 20 when the third period ended with the Red Devils ahead, 48-28.
"This was definitely a personal matter for the team," coach Anthony Corrado said. "We wanted to prove that we didn't give them our A-game the first time."
Red Devils senior point guard Brianna Logan (12 points) netted her 1,000th career point on a jumper in the first quarter. She was named the tournament's most valuable player.
"It was nice to score my 1,000th point, but I'm just happy we won," Logan said. "We're rivals. Off the court, we're friends with them. So we didn't hear the end of it when they beat us. Now, I'm sure they're not going to hear the end of it."
On Wednesday, the teams will meet for a third time - this time for the Burlington County Liberty Division title.
Rancocas Valley 13 23 12 9 - 57
Willingboro 9 9 10 16 - 44
RV: Kristin Smith 2, Dominique Ward 4, Lauren Moses 26, Jasmyne Lewis 2, Brianna Logan 12, Sabrina Jackson 5, Jordan Woods 6.
W: Gabby Bennett 6, Vanessa Francis 10, Maya Moseley 6, Micahya Owens 15, Imani Stepney 7.
Contact Chris Melchiorre