Modern and classic SharePoint experiences are similar in many ways, but they do have some major differences. The modern version integrates Office 365 Groups and allows users to collaborate without ever leaving SharePoint. The classic version features blog and wiki pages, but requires coding to use. Ultimately, which experience you want for your team will depend on what you need from the platform.
SharePoint experience

SharePoint has two main types of experience – the Classic experience and the Modern experience. The Classic experience redirects users to another page for simple tasks, while the modern experience makes it easy to collaborate without leaving the site. In both cases, the navigation is simple and the interface is self-explanatory. The difference between the two experiences is in the way information is displayed.

The Modern experience is recommended for most list and document libraries. However, you can switch back to the classic experience if you need to. The option is available under the List settings and Library settings menus.
Furniture styles

The Classic and Modern styles are both rooted in symmetry and balance, but they take different approaches to light and color. For example, in the classic style, walls are usually plain and covered with gypsum board, while in the modern style, walls are covered with wallpaper, wall panels, and other decorations. The classic and modern styles also differ in their treatments of upholstery and decorations.

In the United States, the Arts and Crafts movement was born during the nineteenth century. During this time, people sought to create furniture that was simple, functional, and beautiful. They were dissatisfied with the over-ornate, decorative, and industrial designs of the era. Arts and Crafts furniture is characteristically utilitarian and simple.
Search experience

Whenever you search in Office 365, you’ll have both a classic and modern search experience. The classic experience includes search on the start page, document libraries, and home pages. The modern experience includes search on document libraries and home pages, but with a search box. This allows you to customize your search results.

Modern search is different from classic search because you have to search the entire SharePoint site, rather than just specific files. Modern search results are based on previous Office 365 activities and are much easier to navigate. In addition to this, it also gives you personalised search results based on your past history, which makes the search process cleaner and faster. On the other hand, the classic search experience is more limited and offers less customisation.
Office 365 integration

One of the biggest differences between the classic SharePoint experience and the modern experience is the way in which you can work with groups. Traditionally, teams have accessed the same team site and used it for all their work, but with the introduction of Office 365 Groups, team members no longer have to use the same site for all of their work. This allows them to collaborate with their team members without ever leaving SharePoint. It also allows them to add content to the Stream feature, which they can share with the rest of the organization.

When you first installed Office 365, you might find that you are confused about where to find the features you are used to using. The new admin center can be difficult to navigate, and many users need help getting used to the new version. The new admin center has been built around the latest technology and has both modern and upgraded features. It also has a classic site collection, which is what most people use when working on their SharePoint sites.