Neither careers pay particularly well for the amount of work needed for you to become qualified. Coming from a pharmacy background myself, I can tell you that your roughly looking at a payscale between £30-60k a year, however most pharamcists earn a median range of £40k.
The other point to make is that if your looking to become a pharmacist, career progression is extremely limited at the moment,as well as job oppurtunities, due to there being way too many pharmacists in the country already, so the likelihood to be earning great money is slim.
However if its not about money or prestige then 100% go for it! But be prepared for long hours and a lot of not so interesting stuff you need to learn.