Alex Salmond offers a careful, considered critique of the Calman tax proposals, their weaknesses and speaks of his wish to find a way to improve them. This is a statesman – and an economist – speaking, with the interests of Scotland and the Scottish people at heart.
David Mundell, under Gordon Brewer's questioning, waffles frantically about Calman, and displays an almost total inability to come to grips with the numbers and hard facts. Instead, he relies on political generalities and attacks on the SNP.
This is Moore's man in the Scottish Office. He had high hopes of being Scottish Secretary under a Cameron Government (as the Scottish Tories' sole MP, there was little choice!) but the coalition, plus perhaps a little local difficulty with his election expenses (those pesky numbers again, David!) put paid to that.
He had to watch two young LibDems fill the post he had coveted - first Danny Alexander and now Michael Moore.
Not that numeracy - or anything much else - is required of a Scottish Secretary - only blind loyalty to the Union and the willingness to be Westminster's man in Scotland instead of Scotland's man in Westminster.
Colonial governors never did require much between their ears, only the ability to salute the Union Jack.
The last three incumbents of this ignoble role - Murphy, Alexander and now Moore - have filled the role in the way required by their UK bosses. Scots expects nothing from the office of Scottish Secretary, and nothing is what they get, except regular protestations of loyalty to the Union.