But after impressing in the tournament so far and on the back of a convincing win over Scotland, Wales are in confident mood ahead of the title decider and according to Jenkins, they have benefitted from some intense training sessions against Howley's men.
"The seniors bring an intensity to every session. They're all very clever players and they've been around the block and done it," said the Wales U20 skipper.
"There are lots of little things we can learn from and the standards they set are very high.
"It's given us good confidence knowing we can train against the senior team and then go out on a Friday and perform."
Wales return to Eirias on Friday night having played their last three games away from home. Wilson's side narrowly defeated Ireland in their first game before away wins over France and Italy.
And last Friday's defeat of Scotland, where Wales ran in six tries in a hugely impressive performance, means Wales are on the verge of completing a clean sweep.
Wales have made four changes from the win in Inverness and Jenkins knows Wales are up against a dangerous England side.
He added: "It's really exciting to be going for the Grand Slam. We've tried not to talk about it up till now but obviously it's the last game now and we're really looking forward to it.
"It will be a tough, tough game and we can't wait.
"England have been good. They lost to Ireland but had a man off after 20 minutes and were down to 14 men.
"But we think we can go out there, give them a good game and hopefully get the result."
On what is a big weekend for Welsh rugby, Wales U20 have the chance to get one over on England before the seniors play the next day.
And with a packed out north Wales crowd ready to roar Jenkins' side on, he says he can't wait to get out there and play.
"Every time we play in north Wales it's a great occasion and the people come out to support us and make lots of noise," he said.
"Now they've put the extra 1000 seats in we're hoping it's going to be even bigger. It's a big occasion anyway but hopefully they can provide that extra boost at home to allow us to go out there and win.
"Any time you get to play for your country is a great opportunity but England is always the one you look out for.
"The Championship is riding on it and we just can't wait to get out there and play."
Tickets for Wales U20 vs England U20 are sold out but you can watch all the action live on S4C from 7.35pm on Friday.