Should I play ninja gaiden 2 ?

I wanted to play gaiden 2 since I found out about game, but as I know emulation is not perfect and you cant finish certain levels, I cant find disc for my 360 and I dont want to buy xbox one just for one game. All I ask know is it better than sigma ? does it have gore like original ? are enemies count like in original and how's AI ?

Overall how close is this to the original game ?

I heard a lot of ppl said this is just a sigma remake so I want to make sure, before bying it