Quite confused about which role I should go for considering I’ve two offers now.

I would judge these positions way more based on the day-to-day skills that you'll be exercising. If they're both primarily software engineering roles on software engineering teams working with software engineers then I wouldn't care what the job title is. I think you should consider your fit at both of these companies and how passionate you are about what they're doing, because I think that will lead to your future success, all else equal, much more than the job title will.