Try starting the other way around - Is the work where you live (or where you want to live) Fixed-winged or Rotary?
I have type ratings for 737's and helicopters and, in my experience, if you find the right employer the wages are not too different.
A CAA Surveyor once told me, as I was leaving the RAF...
"Big Jets have big money and lots of hassle.
Pistons are run by penny-pinching pilots who quibble over each rivet.
Helicopters are labour intensive and complicated to manage.
Business Jets have good money and good conditions - If the owner wants a new Radar and you ask what type - he will say "Colour!"
Big Jets will get slightly more money - Commuter Airlines are 'generally' Crap! But many helicopter operators don't have the current hassles of Airport Security and have much better working 'environments'.
The choice is yours...and you can change your mind if you want to.