Lock Gillanders retains his place in the starting XV, while scrum-half Youngs is among the England replacements.
The Six Nations champions extended their unbeaten run to nine games this season by beating South Africa 26-18 in Wednesdays semi-final and now they face the top seeds.
Noah Cato switches to full back and Mark Odejobi starts on the wing after Alex Tait was ruled out with an ankle injury. In the back-row Jon Fisher replaces Matthew Cox. Odejobis place on the bench is taken by Seb Stegmann.
England U-20 team
15 Noah Cato (Saracens)
14 Mark Odejobi (London Wasps)
13 Luke Eves (Bristol Rugby)
12 Jordan Turner-Hall (Harlequins)
11 Miles Benjamin (Worcester Warriors)
10 Alex Goode (Saracens)
9 Joe Simpson (London Wasps)
1 Nathan Catt (Bath Rugby)
2 Joe Gray (Northampton Saints)
3 Alex Corbisiero (London Irish)
4 Ben Thomas (Saracens)
5 Gregor Gillanders (Leicester Tigers)
6 Jon Fisher (London Irish)
7 Calum Clark (Leeds Carnegie)
8 Hugo Ellis (London Wasps, captain)
Replacements
16 Scott Freer (Leeds Carnegie)
17 Billy Moss (Bath Rugby)
18 Scott Hobson (Cornish Pirates)
19 Matthew Cox (Worcester Warriors)
20 Ben Youngs (Leicester Tigers)
21 Rob Miller (Newcastle Falcons)
22 Seb Stegmann (Harlequins)