Paycheck variances

So I'm not an employer using the QB software however i have noticed something interesting. My previous employer used an accounting agency which used QB to do payroll and My new employer is a larger corporation and dosen't use QB to do payroll where my question lies is my hourly rate at my old job was 15$ an hour and 14$ dollars an hour at my new job. I recieved my paystub from my new job today and something doesn't really seem right to me because it was only 20$ less then my old paycheck and then looking back at some older paystubs from my previous employer when I made 14$ an hour and there was a sizable difference In my opinion as i made ~37$ more on a paycheck  with my new employer vs my old one. I dont understand how there is a difference in pay if the pay rate was the same and they were both for 80 hours in the pay period and all my tax information is the same between the two companies. Both jobs are in the same city. I am just curious as to why this may be and any info provided would be greatly appreciated thank you in advance. And apologys if this is not the correct place for this question.