Hey there! Your questions are actually quite related.
Every staff member increases his respective salary each week by a fixed percentage based on staff level, starting from 1% for minimal and increasing +0.25% for each next level (world renowned is +2.5% per week). That's basically what makes the same levels of staff have very different salaries. The ones that are fired go back to the market looking for a new job. The staff effects are absolutely the same for each member of the respective tier. There's no difference.
It will cost you a lot more to sign a cheap salary staff member though, as many other managers are also looking for bargains. Especially at the higher levels. You will have to find an optimal trade-off between salary and signing fee for yourself.
A piece of advice - do not rush to get staff asap. Take some time to figure out how training works, what makes a trainee good/profitable etc, what the optimal costs are for each type and level of staff and only then go and hit the staff market. You will probably be kicking yourself later if rush this now.

Best of luck!
Last edited by mink0ff at 10/20/2021 10:05:44 AM