Difference between && and where condition in entity framework query

Difference between and condition and two where condition in entity framework query

Code 1

I have using two where condition in my query

 dbContext.Projects.Where(p=>p.ProjectId!=ProjectId).Where(p=>p.Name==Name)
 .SingleOrDefault();

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code 2

I have using && condition without using two where condition

  dbContext.Projects.Where(p=>p.ProjectId!=ProjectId &&  
  p.Name==Name).SingleOrDefault();

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• What is the difference between code1 and code2????

The both queries are return same value. but i don't know the differences. Please explain to me, which one is better. and why?