Jonny Gray leads the team that includes Mark Bennett, Adam Ashe and some of the latest players to join Glasgow's EDP group - D'arcy Rae, Will Bordill, Rory Hughes and Ali Price.
The sides enjoyed differing fortunes in the opening round, with the Scots going down 44-13 to fourth-ranked Argentina while the Welshmen (seeded third) cruised past remaining pool opponents Samoa (42-3).
Scotland U20
15 Damien Hoyland (Boroughmuir)
14 Jamie Farndale (Edinburgh Rugby/Edinburgh Accies)
13 Robbie Fergusson (Ayr)
12 Mark Bennett (Glasgow Warriors/Stirling County)
11 Rory Hughes (Scotland 7s/Stirling County)
10 Tommy Allan (Perpignan)
9 Scott Steele (Leicester Tigers)
1 Jamie Bhatti (Stirling County)
2 Russell Anderson (Gala)
3 D'arcy Rae (Ayr)
4 Adam Sinclair (Perpignan)
5 Jonny Gray CAPTAIN (Glasgow Warriors/Currie)
6 Alex Henderson (Boroughmuir)
7 Will Bordill (Sale Sharks)
8 Adam Ashe (Glasgow Warriors/Stirling County)
Substitutes
16 Callum Black (Edinburgh Accies)
17 James Malcolm (GHA)
18 Phil Cringle (Edinburgh Rugby/Stewart’s Melville FP)
19 Eoghan Masterson (Leinster)
20 Tommy Spinks (London Scottish)
21 Ali Price (Bedford Blues)
22 Chris Auld (Edinburgh Rugby/Gala)
23 Jamie Kilmartin (Bath Rugby)