The rival Officer's Choice is produced by Allied Blenders and Distillers (ABD), owned by Kishore Chhabria, a long-time rival who has been involved in legal battles with Mallya for the best part of two decades.
In a further twist, the current chief executive of ABD and the man credited with developing Officer's Choice is Deepak Roy, a former friend and associate of Mallya who switched from UB Group to ABD five years ago when he was passed over for a top job.
"[Mallya] was born with a golden spoon with several brands he inherited, whereas I had nothing, except the values instilled by my father," Chhabria recently told the Economic Times newspaper.
Mallya, an independent member of the Upper House of India's Parliament, is also the owner of a cricket franchise and co-owner of the Force India Formula One team. His company has questioned the IWSR's figures.
Prakash Mirpuri, vice-president of corporate communications for UB Group, claimed its McDowell's No1 whisky, which consists of three different labels, was the world's largest-selling brand, accounting for 16.8 million cases sold last year. "The perspective is a half truth," he said of reports that Officer's Choice was No1.
The market for whiskies in India is massive. A total of 160 million cases were sold last year, of which more than 90 per cent was Indian-made whisky. A tiny amount of this, such as Amrut Single Malt, is world-class but the vast majority is produced from molasses and tastes like cheap rum.
Yet reports suggest that ABD has become successful by increasingly marketing Officer's Choice as a more upmarket choice, even though a quarter bottle sells for just 55 rupees.
Roy introduced the advertising line: "Awaken the officer in you." Roy said beating Bagpiper gave him great satisfaction but had "nothing to do with a vendetta or teaching Mallya a lesson".
- Independent