If you were given the choice:
Would you be able to fly at 10mph, or run at 100mph? Now that's a sleepless-night kind of question. Seriously though I can't answer your question without context, if you'd do well at A-levels and a degree from a good university would largely benefit you and your disipline then it's A-levels, others an apprenticeship is the way if the quality of the degree isn't as important and it's just the qualification that is.