PTI or Trial Sentencing, Plea Bargains

I was charged with a first degree felony. The alleged "victim" lied, causing a false arrest, my being in jail and a new chapter of five very stressful months, dollars spent on lawyer... anyway, five months later, evidence shows that victim did lie, that the charges were completely exaggerated, that if anything, a trespass was the maximum I can be found guilty of... I have the choice to accept a PTI or go to trial. I am told that the best would be PTI as a trial: there is always a possibility that things go the wrong way... I have a green card. No prior record. lived in the US for 30 years... Just would like to find out what others may choose to do in the situation: a PTI or trial? In advance, thank you.

PS. If PTI, I would enter the program with charge of 3rd degree felony. The lawyer strongly believes that if going to trial, charges will be reduced to a trespass if not case completely dismissed. Lawyer thinks I should go with the safe PTI option though.