Kenmore did come out with some rather strange machines . . . not sure if I'd say they were "creapy" though - but maybe . . .
As to swapping them in the cabinet - since you've got them both - just give them both a good look and see if they will fit. I know a lot of the older machines had the same base size - however if you actually have an industrial machine, then all bets are off.
However I don't think Kenmore sold any industrial machines (they didn't make any machines, just put their name on someone else's), they were just heavy, and cumbersome looking - but not any more "heavy duty" than anybody else's at the time.
It's just that new machines have a tendency to be wimps in comparison - which is one reason we love the older machines!
Also, unless you have a very rare Kenmore, you don't have to search high and low - there are tons of them on Ebay at any given time, and you can get them rather cheaply if you watch for sellers that don't think theirs have gold in the middle.