For Lahiri the CIMB Classic is about getting early momentum as the new 2017-18 PGA season gets underway with a clutch of events in Asia.
But for his friend, Chawrasia, the event is a chance to play alongside the world's leading players and make a mark that could carry him further in a career that has already put him as one of the Top-5 Indian golfers of all time.
Thomas, who won his maiden Major, the PGA Championships, is also two-time defending champion at CIMB Classic, having won last two editions and is attempting for a hat-trick at the TPC Kuala Lumpur.
Chawrasia said, "It has been a great period for me since March 2016, when I finally won the Hero Indian Open after finishing second four times. What made it even better was I won again in 2017 and in between got my first international win outside India - in Manila.
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Two months ago Chawrasia was bestowed with the Arjuna Award. "That (Arjuna Award) was a big deal and I used to admire Jamshed (a former Kolkata golfer) who was the first Indian golfer to get it in 1975, even before I was born."
Chawrasia has played the CIMB three times before, but has always been somewhere around the bottom T-71 (2016), T-73 (2015) and T-47 (2011).
"I like this golf course. I am familiar with it just the way I am familiar with Delhi Golf Club back home. Straight away I am at home and know what to do. It take maybe nine holes to see how the golf course is playing," said Lahiri, who entered the final round four clear of the field last but ended T-third as Thomas retained the title.
"That's the plan so far and I would love to win in these four events and get a start in Hawaii at the Tournament of Champions," said Lahiri, whose best in PGA was T-2 at the Memorial in 2017.
Lahiri finished T-26 (2011), T-35 (2012), T-52 (2014) and T-21 (2015) in the last four appearance in the tournament but he was T-3rd last year.
This weeks CIMB Classic is star-studded with nine Major champions, 10 Presidents Cup team members, 15 players from the top-50 of the Official World Golf Ranking and 18 winners from the recent PGA TOUR's 2016-17 season.
The 24-year-old, ranked fourth in the world, bagged the prestigious FedExCup and Player of the Year Award, in addition to being part of the victorious United States team which won the Presidents Cup, beating the Internationals two weeks ago.
The field includes world No. 3 Hideki Matsuyama, Paul Casey, Xander Schauffele, Charl Schwartzel, Rafa Cabrera Bello, Si Woo Kim, Anirban Lahiri and recently inducted World Golf Hall of Fame member, Davis Love III.