Entityframework .Select vs Mapping method [Answered]

Is the following the same or has it performance difference?

var myList = await _dbContext.SomeList.Select(x => new myDTO{...}.ToListAsync();

var myList = await _dbContext.SomeList.Select(x => new myDTO{...}.ToListAsync();

var myData = await _dbContext.SomeList.ToListAsync();
var myList = MapToMyDTO(myData);

var myData = await _dbContext.SomeList.ToListAsync();
var myList = MapToMyDTO(myData);