They should be same
No one is best
But the MT5 back test has more features and more new ideas which have a great future rather than MT4
The MT5 could test more than an EA and/or more than a currency in each single test
The above two featureS are not possible in MT4
Do you mean they have used same parameters, pair, period of test, same broker and same conditions?
If you are backtesting EA on MT5 using 'every tick based on real ticks' so it will be almost same with trading on MT5 platform with some particular broker (because it is based on actual historical data).
Example, read this thread: Why is it better MT5 than MT4?? Does it have fewer limitations ??? - this is the quote from the first post of the thread:
For more information about it - read this summary.
As i know - some coders/traders are converting their MT4 EAs to MT5 just to backtest them and/or to find the settings with optimization to get the backtesting results that are closest to reality.
MetaQuotes company (MQ) is not a broker (MQ is software development company). It is the brokers are deciding (based on their legislation, registration, etc) - to use hedge option or not to use.As to the brokers so you can read this threads/pages:
More than 100 major brokers around the world offer MetaTrader 5 andLiquidity for MetaTrader 5 from Just2Trade: 9000+ instruments on NYSE, NASDAQ, LSE and other exchanges
NVIDIA shares - closed in profit (MT5 hedge account - but I did not use hedge for now):