Implementing EqualityCompare vs overriding GetHashCode and Equals

public class UserChartQuery
{
    public int UserId { get; set; }
    public int ChartQueryId { get; set; }

    public virtual User User { get; set; }
    public virtual ChartQuery ChartQuery { get; set; }

        protected bool Equals(UserChartQuery other)
    {
        return UserId == other.UserId && ChartQueryId == other.ChartQueryId;
    }

    public override bool Equals(object obj)
    {
        if (ReferenceEquals(null, obj)) return false;
        if (ReferenceEquals(this, obj)) return true;
        if (obj.GetType() != this.GetType()) return false;
        return Equals((UserChartQuery) obj);
    }

    public override int GetHashCode()
    {
        unchecked
        {
            return (UserId*397) ^ ChartQueryId;
        }
    }
}

public class ChartQuery
{
    public int ChartQueryId { get; set; }
    public virtual ICollection<User> Users { get; set; }
   ...more...
}

public class User
{
    public int UserId { get; set; }
    public string UserName { get; set; }
    public virtual ICollection<ChartQuery> SavedChartQueries { get; set; }
    ...more...
}

builder.Entity<ChartQuery>()
    .HasMany(cq => ucq.Users)
    .WithMany(u => u.SavedChartQueries);