The first one is from bbclearningenglish.comThey don't mean exactly the same thing, no. Where are those sentences from, please?
This is incorrect. But you could say: "It was a provoking exhibition, like the one before it."It was a provoking exhibition as the one before it.
Sentence 1 means the two exhibitions were equally provoking*. Sentence 2 means that they were both provoking but one may have been more provoking* than the other.1) It was as provoking an exhibition as the one before it.
2) It was a provoking exhibition,aslike the one before it.
I understand it as "provocative", i.e. it provoked (some) people to react, probably negatively.*I now wonder if the BBC didn't by any chance mean thought-provoking. 🤔