When comparing PreSonus Notion vs Soundslice, the Slant community recommends PreSonus Notion for most people. In the question“What is the best music notation software?” PreSonus Notion is ranked 8th while Soundslice is ranked 9th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Good DAW integration
Pro Sequencer and playback editing tools built in
Pro Notatal score pro
Pro Great library
Pro Web-based
Nothing to download or install.
Pro Imports Guitar Pro files
Great support for importing Guitar Pro files, of which there are many across the internet.
Pro Imports MusicXML
Great support for importing MusicXML from other notation editors.
Pro Great for transcribing
The editor can sync with YouTube videos or MP3s, which makes for a very efficient transcription workflow.
Pro Free
The basic version is free, though there are paid features such as ability to add custom keyboard shortcuts.
Cons
Con No organs
There are no downloadable organs for this product.
Con Lacks the advanced engraving tools of Finale, Sibelius, and Dorico
Con Little control over engraving
The sheet music is "responsive," meaning it wraps to fit whatever device you're on. So this isn't intended for creating notation for print publication — it is native to the web.