Taking any random strategy and opening on SQX and QA you can see differences on several Stats like: CAGR, Sharpe Ratio, Winning percentage??, AHPR, STR Quality Number, etc.
You can check it by yourselves, I attach a random strategy. I've checked several strategies and values like CAGR, etc are differents on SQX and QA.
Right now I'm using SQX B129 and QA 4.70