How accurate is princeton review?

So i took the actual sat a while ago and got a 740 on the english section. I started using pr’s practice exams bc im planning on retaking it but i havent been able to get higher than a 700 in english… Was my 740 just a fluke or is princeton review supposed to be harder than the actual sat?

@aaaaaaaaaaaaaaaa Just take an official one that is on khan academy