>>713359913 (OP)>Ninja GaidenFaster paced designed around running through the level fast while dispatching enemies fast with lots of replayability to get high scores.
>ShinobiLooks to be closer to a "modern" 2d action game with a focus on bigger enemy healthbars and combos. Also, pure speculation but I think it might be a metroidvania, I haven't seen anything that suggest it's staged based.
Both games are doing different things but still keep the ninja core, with different but great looking artstyles. I will buy and enjoy both.