I find that I prefer Note Taker HD over Notes Plus (I have both). Two main reasons:
1) You cannot delete notes in Notes Plus. You can send them to the Trash, yes. But, in the Trash folder, if you swipe, you'll get a "Restore" button that'll send your note back to the active file. There is no "Delete" button.
2) You don't get full landscape function. When you have Notes Plus in landscape, the file structure list still shows on the left hand side. If there is a way to remove it, I haven't found it, but it limits the size of your paper in landscape mode.
I also found the return function of the zoom-in handwriting function to be a bit hinky in Notes Plus. Sometimes, instead of taking my handwriting to the next line, I was writing over my previous writing.
I do like the way Notes Plus writes and auto-corrects lines, circles, etc. It is very smooth and works well. I also like, that in zoom-in handwriting, I can see where to put my finger/stylus better (see your previous handwriting versus blank in Note Taker HD).
Of course, a lot of this is operator error and may just need more practice. I may like Note Taker HD 'cause I've had it/used it longer. They both are good note taking apps
TBH, though, the deal-killer for me with Notes Plus is the inability to delete. I simply hate that! So, it's Note Taker HD that I use in college. YMMV.
Marilyn