The pay is the same on all fleets.
In the rank of S/O, there are 3 pay scales depending on your experience:
1) Below 500TT or 100 Jet
2) Above 500TT AND 100 Jet
3) Above 1000TT AND 500 Jet
Once you pass 1500TT with 1000 Jet, you move up to the F/O rank and it's associated pay scales which are primarily dependant on time with the company.
On the first of the S/O pay scales, after tax, you'll take home about 2000-2100/mth. 2300/mth on the second scale and about 2500-2600/mth on the third.
These all exclude all sector pay, duty payments and the FWS (flexi payments) which can add a few hundred on.
Hope that helps.
I did my training externally so can't help on the type rating issue !