Low in hand + more esops vs higher in hand + lower esops

Leaving a job with lesser pay but significant esop ( 75% still unvested tho) with a few years to go to ipo for a job with 40% increase in pay but only 30% of earlier esop base. Is this wise?

Also what does it mean for me if i have unvested esops but the new company goes into an ipo within a year or 2?