FC.build_stubbed vs other FC strategies

bout3.rb

describe "FactoryGirl.build_stubbed VS [FactoryGirl.build, FactoryGirl.create]" do
  subject { book.with_characteristics?(options) }

  let(:options) { {author_name: book.author.name, publisher_name: book.publisher.name} }

  bout3_number_of = 200

  context "when setting up with FactoryGirl.build_stubbed" do
    let(:book) { build_stubbed(:book) }

    bout3_number_of.times do
      it { is_expected.to eq(true) }
    end
  end

  context "when setting up with FactoryGirl.build" do
    let(:book) { build(:book) }

    bout3_number_of.times do
      it { is_expected.to eq(true) }
    end
  end

  context "when setting up with FactoryGirl.create" do
    let(:book) { create(:book) }

    bout3_number_of.times do
      it { is_expected.to eq(true) }
    end
  end
end