The question came in asking "Do you lose your salvation if you go from Reborn Christian to J. Witness?"
The answer is YES. JW's are a cult because they deny the deity of Christ. Since it is necessary for Jesus to become fully human in order to become an effective sinless intercessor for those who put their faith in his death as a sufficient payment for sin, for one to embrace that error on the fundamental truth of Christianity then there is no salvation (Heb 6.4-6; 10.26) there.
JW's are in error in their view of the trinity. They have falsely prophesied 5 or 6 times the end of the world. They misuse scripture And practice cult like control over their adherents. Their view of salvation is one of works.