Can my additional fields appear as rows in the product comparison table?

Yes, if you also use the Product Comparison plugin.

1. Go to Products → Product Comparison.
2. In the Additional fields section, tick Include additional fields in the comparison table.
3. Tick the fields you want as rows, for example RAM and Battery life.
4. Save the comparison settings.

If you tick the main box but select no fields, every additional field that has a value is shown. The Additional fields section only appears while the Additional Fields plugin is active on your store. If it lists nothing, create your fields first in Products → Additional Fields.