No and maybe.
Despite what you tend to read on steroid forums, aromasin is a potent AI and is referred to as such in pretty much any literature you read on it. I read the same thing long ago, "you can't crash your estrogen with aromasin.". I believed it... Well, I succeeded in crashing my estro twice. I can't remember the exact cycles I was taking at the time but there was at least 1 gram of aromatizing compounds involved both times and low aromasin doses also.
I've used adex and I've never crashed my estrogen. However, I don't remember the last time I even took an AI... I just don't need them. Plus, once you crash your hormones... You tend to be in no hurry to repeat it. At first I thought I was coming down with the flu... It is truly a horrible feeling.
My point was mainly that any AI can crash your estrogen. One might be able to do it faster depending on how you take it... Especially some of the newer drugs that are coming out that aren't really spoken about. These compounds are intended to fight cancer... Which are typically the "no fucking around" sort of drug.