And after falling at the semi-final stage at last year's World Club 7s, Moyano says his team approached their second trip to Rugby HQ with a clean slate - and it paid off.
"It feels unique, I really don't have words to describe it," said Moyano. "We are very happy and this is the first time for many of us here at Twickenham, so winning a title is just amazing. For Argentina, Buenos Aires, the players and coaches - we want to enjoy it as much as we can.
"This is a very tough tournament. Last year we finished third so this year we didn't want to think about that, just focus on this team who had the chance to come and play. Fortunately we could play as we wanted and things went right.
"We played every match like a final and we knew Cardiff were a very tough team. In the quarter-final until I think the tenth minute we were losing, so we knew every match would be as hard as the last."
Undoubtedly the two standout teams of the competition, Franco Sabato edged Buenos Aires ahead against Auckland to kick things off.
Then Mitch Karpik found himself with time and space on the right to run over and restore parity, before the conversion sent Auckland into the lead.
It got even better for Karpik as this time the Kiwi cantered home in the left-hand corner, and Auckland marched on after the break thanks to Kali Hala.
But Rodrigo Etchart zipped away from outstretched arms to reduce the arrears and the comeback was complete as Paz notched twice in the final three minutes to ensure Buenos Aires took the cup by 26-22, as Karpik's third came too late.
And Twickenham was treated to a possible star of the future in Karpik - who has just finished his education - with the teenager determined to go back to New Zealand and learn from his weekend at Twickenham.
"I'm pretty tired after that one, a long 14 minutes, but I'm proud of the boys - they dug it in right to the end," Karpik said.
"Hopefully next year it'll be third time lucky, fingers crossed. It's been such a pleasure to compete here.
"This is my first year out of school and first tournament playing 7s so I've really enjoyed it, the boys have helped me along the way.
"It's been a long two weeks all the way from New Zealand, we're a new bunch of boys who have just come together, so we can only look forward to our summer - it's onwards and upwards from here."
"It was a team hat-trick, the boys put me in there, so full credit to them."
Buenos Aires 7 Cardiff Blues 5
RC Enisei 12 Kuban Krasnodar 19
Auckland 36 New York 5
Western Province 22 Blue Bulls 12
Buenos Aires 35 Kuban Krasnodar 12
Auckland 19 Western Province 14
Buenos Aires 26 Auckland 22
Kuban Krasnodar 20 Western Province 19
Cardiff Blues 35 RC Enisei 5
New York 14 Blue Bulls 31
Cardiff Blues 28 Blue Bulls 12
RC Enisei 7 New York 34
NSW Waratahs 19 Harlequins 26
Seattle 22 Gloucester Rugby 12
Harlequins 14 Seattle 28
NSW Waratahs 17 Gloucester Rugby 22