If you liked the first, the second shouldn’t disappoint. Not only is it 3 times longer than the fairly short first one, but levels are mostly bigger, with one in particular being one of the most brilliant level designs I have ever seen!
Also, playing as both Emily and Corvo brings two substantially different play styles. And of course don’t forget playing low chaos and high chaos. For me it had multi-playthrough and is maybe just a smidge less than the brilliant first one. It goes in my top 20 with the first one.