Possible Clues:

• Totally alone
• Just like the Commons -- beyond compare
• With no rival, don’t strain so much to see
• The House of Lords certainly isn't supreme
• Unrivalled like the Commons?
• Unequalled, like the House of Commons
• Look smaller, though unique
• Lord's lower in estimation, having no matches
• Incomparable
• Unrivalled, like the House of Commons?