Mac Scrivener makes extensive use of the Mac OS text system, which provides the infrastructure for basic editing, basic formatting, spelling and grammar checking, and linguistic focus, among other things. There is nothing comparable available for the Windows platform: a significant part of the delayed release of Windows Scrivener 3 can be attributed to the need to create these capabilities from scratch.
The best way to decide whether Windows Scrivener 3 will meet your needs is to evaluate the beta, which I believe is feature-complete or nearly so. You can download it here:
https://forum.literatureandlatte.com/t/scrivener-3-0-beta-release-candidate-10-download-links-change-list/38228/1
Katherine