They are similar filters, but you would still need a new multiport vavle and redo all the plumbing connections to that. It does not use the same grids. A Pentair 180009 (60) is basically the same as your old filter but with larger grids. It could reuse the same multiport valve, but the grids would still be taller. You'd have to measure the height of the ports on each filter, but it may be possible to just connect it to the multiport vavle where it sits now.
Either way, PVC plumbing is not hard to do and is very cheap.