I'm currently working on a project for an internship where I need to reverse engineer a design for a vibration simulator, which use two 556 timers in order to generate four output signals. The final prototype will be a PCB, and using 556 timers would be more expensive to produce.
My question: Are there any distinct differences between using two 556 timers vs. four 555 timers?
From looking at datasheets (NE556DR and NE555DR), the typical current draw from both seems to be the same. In this case, what are the advantages to using the 556 in this scenario?