The versatility of Tatra gives him a slight edge over stablemate Proverb as they aim to improve on trainer Peter Snowden's excellent record in the Group Two Sandown Guineas.
Snowden won the Sandown Guineas with Caymans and Kidnapped in 2008 and 2009 before Chasse was second a year later and Galah was beaten in a three-way photo finish 12 months ago.
Tatra and Proverb head into the end-of-carnival feature for three-year-olds on Saturday on the back of last-start placings in the Listed Carbine Club Stakes and can't be faulted, according to assistant trainer Paul Snowden.
Snowden believes both colts have "great chances" but Tatra is the more versatile of the duo.
"The one thing with Proverb is that you can't put him into a spot," Paul Snowden said.
"We've tried to ride him more forward and he doesn't have the finishing burst as he has when he's ridden quieter.
"We're still going to ride him where he's comfortable early, whereas Tatra has a bit more adaptability and can lead or sit off the pace.
"But they are both good chances and are certainly going very well."
An early campaign setback in Sydney ended hopes of Tatra contesting the Group One Spring Champion Stakes (2000m), with Peter Snowden shifting his focus to Melbourne with the colt.
"He came down from Sydney in good form but raced really poorly in his first start here (in the UCI Stakes)," Paul Snowden said.
"He was on the wrong leg and wanted to hang so we freshened him up again ahead of his last start and he's never looked better and hasn't been going any better.
"He's turned the corner big time and it's pleasing to see because we know he's a talented horse."
Tatra and Proverb were second and third respectively behind Sandown Guineas rival Lunar Rise last start but meet the Bart Cummings-trained runner 1kg better at the weights on Saturday.
Snowden said Proverb wasn't suited by barrier one last start as he is a horse that needs to be able to wind up from back in the field.
"He only got out at about the furlong-and-a-half (300m mark) and he's a horse that needs to build into the race," Snowden said.
"He was dictated to by being on the inside from barrier one which was the wrong barrier for him."