Wilson said: "I'm very proud of the character this group of players has shown throughout this tournament and the outstanding manner in which they dug in to win the semi-final against South Africa along with the two Pool matches against Scotland and Argentina.
"Beating New Zealand last year was a big turning point in our development as a team and then we've consolidated that confidence with the win over another power in South Africa."
Wilson believes there will be tightly contested battles in many areas of the game on Sunday.
"The commitment of both sides at the breakdown and in defence will be key areas of the game," he said.
"There is an extra motivational factor in that we lost to England in the Six Nations but more importantly, we must get our execution right on Sunday.
"England were a cut above us in that game, but we have come a long way since then in terms of our performances in this competition and if we play to our best ability, there is no reason we can't come away as winners."
Wales are hoping to count on the Lion's share of support from the crowd at Stade de la Rabine in Vannes.
"We have had great support from families who have travelled out along with people back home, and with the Celtic connection, the Breton rugby public have been very supportive," said Wilson.
"We are hoping they will wear red to give us an extra boost on Sunday."
Wales Under 20:
Jordan Williams (Scarlets / Llanelli); Ashley Evans (Ospreys/ Bridgend), Steffan Hughes (Scarlets / Llanelli), Jack Dixon (Dragons), Hallam Amos (Dragons/ Newport); Sam Davies (Ospreys / Swansea), Rhodri Williams (Scarlets/ Llandovery); Gareth Thomas (Scarlets/ Carmarthen Quins), Elliot Dee (Dragons / Bedwas), Nicky Thomas (Ospreys / Swansea), Carwyn Jones (Scarlets / Carmarthen), Rhodri Hughes (Ospreys/ Swansea), Jack Jones (Ospreys / Rovigo), Ellis Jenkins (capt, Blues / Cardiff), Ieuan Jones (Dragons/ Newport).
Replacements: Ethan Lewis (Blues / Cardiff), Thomas Davies (Blues /Cardiff), Dan Suter (Ospreys/ Bridgend), James Benjamin (Dragons/ Bedwas), Daniel Thomas (Scarlets/ Llanelli), Joshua Davies (Dragons / Bedwas), Owen Jenkins (Blues/ Pontypridd), Thomas Pascoe (Blues / Pontypridd).
England Under 20:
Jack Nowell (Exeter Chiefs); Anthony Watson (Bath Rugby), Harry Sloan (Harlequins), Sam Hill (Exeter Chiefs) Ben. Howard (Worcester Warriors); Henry Slade (Exeter Chiefs), Alex Day (Northampton Saints) ;1 Alec Hepburn (London Wasps), 2 Luke Cowan-Dickie (Exeter Chiefs), 3 Scott Wilson (Newcastle Falcons), 4 Tom Price (Leicester Tigers), 5 Dominic Barrow (Leeds Carnegie), 6 Ross Moriarty (Gloucester Rugby), 7 Matt Hankin (Saracens), 8 Jack Clifford capt (Harlequins),
Replacements: Scott Spurling (Saracens), Danny Hobbs-Awoyemi (Northampton Saints), Tom Smallbone (London Irish), Harry Wells (Leicester Tigers), David Sisi (Bath Rugby), Callum Braley (Bristol Rugby), Ollie Devoto (Bath Rugby), Henry Purdy (Leicester Tigers).