The 6ES7193-4CF40-0AA0: The obvious difference is width: 30 mm vs 15 mm on the 6ES7193-4CC30-0AA0. This one gives you the AUX1 continuous rail – so you don't need extra jumpers for auxiliary power across slices. The narrower sibling lacks that continuous bus; you'd need to wire AUX1 separately per module. The 30 mm module also holds 4×6 screw terminals, while the 15 mm version has fewer terminal points. If your panel already cuts out for 15 mm modules, this won't drop in without widening the slot.
Mounting note
Mounts on the standard ET 200S rail. At 157 mm tall, it aligns with other 30 mm modules. AUX1 bus clips into adjacent modules with AUX1 terminals.