If'n ya get a Kitchenaid....get the one "industrial" one.
The home model is a bit weak.
I dont know about the old ones and interchangeability though....sorry.
Yep. Picked our Pro 600 up at a specialty kitchen store, refurbished.
Has, I think, a 575 watt motor, and a 6 qt bowl.
Wal-Marts version is 200 and some watts, 4 at bowl. Sis-in-law has that one.
She and the wife make peanut butter eggs together, once at her house.
They had her mixer so hot, it shut down.
Ours will mix that putty all day, no problem.
Double batch chocolate chip. Mixes easy, could do at least one more in the bowl.
Grinder? Have put deer through it as fast as you could feed it (small throat)
Plenty of power, never gets hot.