sentence1: Since, boilermakers earn somewhat more than ironworkers,42 it is reasonable to expect that with increased job stability in the boilermaker trade, some ironworkers might choose to move to the boilermaker trade for the higher pay, especially if they had worked as boilermakers in the past.
sentence2: Ironworkers with prior experience as boilermakers could possibly be enticed to switch jobs due to the changes in boilermaker trade.