sedra 5000 same as 7000?

[foreverfortune]

im thinking that it is the larger and not the smaller sized ones. it has more of a rounder apperance and not of the squarer ones.

question: does the a or p at the end of the model number make any difference? or is the attachments that are included the only difference between them. for example sedra ksp-5000a and ksp-5000p? thanks