Good morning
It doesn't matter what kind of machine or processor a boot sequence is pretty much similiar. The person that noted that with more RAM the sequence is longer is correct. One of the first steps is to check physical RAM. The more RAM the longer it takes.
Also, during the boot sequence the minimum amount of resources are really available, since these are the ones simply required to get the thing up and running. It takes the drivers being loaded and other software (much later in the sequence) for the advanced hardware and software to become available.
Lastly, the boot sequence can vary from machine to machine depending on the settings, just like the log in sequence can change depending on the user.
I used a G4 at home and a dual Xeon at work and the dual Xeon takes much longer. Also, if there is a SCSI chain active that has it's own boot sequence.
My point is that in terms of overall performance, the boot sequence is not very indicative.
Take care.
David