I've read there are differences between 'like' and 'as' regarding comparisons, the first one being a preposition and the second one a conjunction. Please note the following examples:
I didn't know there was a website like this.
I didn't know there was a great website like this.
I didn't know there was such a great website as this.
I didn't know there was a website such as this.
Are all those sentences correct and considered proper English?
What are the functions of the words "as" and "like"?
Is "such as" a synonym for "like"?
This thread was inspired by the thread http://www.usingenglish.com/forum/as...2-pretend.html by Jasmin165 and by private conversations with emsr2d2 whom I kindly acknowledge.
1 & 2- the same apart from great- the first could mean a good site or a bad one, but there's no real difference.
3 & 4 - 4 is simply giving an example of a website while 3 is saying that the person had been unaware of any website of that standard.