Depends what you call tech.
You can do both by following the w2 route but if your mate isn’t that confident I would say this is too long. For a beginner they are technical, for an experienced rider they are not highly tech.
If you want to have ago at both I would do the wall first, go back to the trail centre, have a rest grab some food and drive upto glyncorrwg if he’s feeling good and tackle whites.
The problem you may have riding both in one go is if he gets tired then it will be difficult for him as its a fairly long ride (3-5hrs)
Great fun single track trails