There are quite a few posts and videos on Cricut vs. Silhouette Cameo machines, but not too many on ScanNCut vs. Silhouette Cameo vs. Cricut machines. I use all three kinds of machines and thought I may be able to help you decide between them if you're thinking about purchasing one for the first time
Cricut or Silhouette?! Which Machine Should I buy?
Which Cutting Machine is Right for You? Comparison of Silhouette Cameo, Cricut Maker & Scan n Cut DX
Cricut vs. Silhouette vs. Brother - SVG EPS PNG DXF Cut Files for Cricut and Silhouette Cameo by SavanasDesign
ScanNCut vs. Silhouette Cameo vs. Cricut: Which Machine is Right For You? - Conquer Your Cricut, Cameo & ScanNCut Confusion!
Silhouette Studio: Group vs. Weld - Conquer Your Cricut, Cameo & ScanNCut Confusion!
Silhouette Cameo vs Cricut Explore vs Brother Scan n Cut
Silhouette vs. Cricut - My Unbiased Review
Make Stickers with the ScanNCut DX - Conquer Your Cricut, Cameo & ScanNCut Confusion!
Cricut, Silhouette, or Brother: All Electronic Cutting Machines Compared!
ScanNCut vs Silhouette vs Cricut: Which Machine is Right for You?
Silhouette Cameo vs Cricut Explore vs Brother Scan n Cut