What is the difference between the service cloud and vs sales cloud of salesforce?

In the context of Salesforce, here are the differences given between service cloud vs sales cloud:-

Sales Cloud

Salesforce’s sales cloud is a customer relationship management platform that is designed to help businesses managements and their sales process. The key features of this cloud are the following:-

Lead management

Opportunity tracking

Contact and account management

Sales forecasting

Sales performance Analytics

Service Cloud

Salesforce’s service cloud is a customer service and support platform that tries to enable the business to provide exceptional customer experience and also resolve customer issues efficiently. The key features of this are the following:-

Case management

Knowledge base

Omni channel support

Services level agreement

Customer self service portal

Here is the example given for salesforce sale cloud

  // Apex code for Salesforce’s Sales Cloud (Example)

Public class SalesProcess {
    Public static void createLead(String firstName, String lastName, String email) {
        Lead newLead = new Lead();
        newLead.FirstName = firstName;
        newLead.LastName = lastName;
        newLead.Email = email;
        newLead.Status = ‘Open – Not Contacted’;
        insert newLead;
    }
    Public static void updateOpportunityStage(Id opportunityId, String newStage) {
        Opportunity opp = [SELECT Id, StageName FROM Opportunity WHERE Id = pportunityId];
        Opp.StageName = newStage;
        Update opp;
    }
    Public static void generateSalesReport(Date startDate, Date endDate) {
        // Code to generate and email sales report based on specified date range
        // This feature can be part of Sales Cloud analytics and reporting capabilities
    }
}
Here is the example given for salesforce service cloud
// Apex code for Salesforce’s Service Cloud (Example)
Public class CaseManagement {
    Public static void createCase(String subject, String description, String contactId) {
        Case newCase = new Case();
        newCase.Subject = subject;
        newCase.Description = description;
        newCase.ContactId = contactId;
        newCase.Status = ‘New’;
        insert newCase;
    }

    Public static void escalateCase(Id caseId, String assigneeId) {
        Case escalatedCase = [SELECT Id, Status FROM Case WHERE Id = :caseId];
        escalatedCase.OwnerId = assigneeId;
        escalatedCase.Status = ‘Escalated’;
        update escalatedCase;
    }
    Public static void createKnowledgeArticle(String title, String articleContent) {
        Knowledge__kav newArticle = new Knowledge__kav();
        newArticle.Title = title;
        newArticle.Article_Content__c = articleContent;
        newArticle.Language = ‘English’;
        newArticle.KnowledgeArticleId = [SELECT Id FROM KnowledgeArticleVersion WHERE IsLatestVersion = true].Id;
        insert newArticle;
    }
}