MT4 Backtesting Vs MT5 Backtesting which give the most accurate result?

 
I want to know which platform can give most accurate result and best performace or any tips about what i need to do to  be a reliable backtest?
 
1Million Aim:
I want to know which platform can give most accurate result and best performace or any tips about what i need to do to  be a reliable backtest?

MT5 by far, plenty of topics on the subject.

 
Thank ya
Reason: