Score for Custom Job Description:
1. Job Title: 10/10, 10/10, 10/10
2. Introduction/Overview: 8/10, 8/10, 9/10
3. Roles & Responsibilities (or Job responsibilities): 9/10, 9/10, 9/10
4. Years of Experience: 10/10, 10/10, 10/10
5. Education Qualification: 10/10, 10/10, 10/10
6. Skills/Knowledge: 9/10, 9/10, 9/10
7. Domain/Industry:  8/10, 8/10, 9/10
8. Key Competencies: 7/10, 7/10, 8/10
9. Employment Type: NO DETAILS FOUND
10. Company Overview: 9/10, 9/10, 9/10
11. Benefits & Opportunities: NO DETAILS FOUND
12. Location & Travel: 10/10, 10/10, 10/10

Explanation:

1. Job Title:
The custom job description clearly states the job title, which matches the benchmark job description, ensuring clarity, completeness, and relevancy.

2. Introduction/Overview:
The introduction provides a detailed overview of the company, but it could be more concise for clarity. It is complete and relevant to the industry.

3. Roles & Responsibilities:
The roles and responsibilities are clearly defined, complete, and relevant to the job title. They align well with the benchmark description.

4. Years of Experience:
The custom job description specifies the required years of experience, which aligns with the benchmark, ensuring clarity, completeness, and relevancy.

5. Education Qualification:
The education qualifications are clearly stated, complete, and relevant, matching the benchmark.

6. Skills/Knowledge:
The skills and knowledge required are clearly mentioned, though some minor details may be missing when compared to the benchmark. Overall, it is complete and relevant.

7. Domain/Industry:
The domain is implied through the company overview and responsibilities, but it could be more explicitly stated. It is complete and relevant to the job.

8. Key Competencies:
The key competencies are listed, but they could be more explicitly tied to the job role for clarity. They are complete and relevant but could be better aligned with the benchmark.

9. Employment Type:
No details are provided regarding employment type, which is a critical omission.

10. Company Overview:
The company overview is extensive, providing a clear, complete, and relevant background of the company, aligning well with the benchmark.

11. Benefits & Opportunities:
No details are provided about the benefits and opportunities, which is a significant gap in the job description.

12. Location & Travel:
The location is clearly stated, and while there is no explicit mention of travel requirements, the description is complete and relevant based on the job title and responsibilities.