IMO a different use case. Ra'ad/Ra'ad II is primarily for delivering nuclear warheads, while the SOM is a long-range conventional weapon.
But with a warhead weight of 230 kg, the SOM's primary benefit is range (250+ km).
I would much rather develop a new Ra'ad that fits on the JF-17 but carries a 500+ kg warhead, so long-range and heavy. Perhaps something along the lines of the Raptor 3 by Denel Dynamics (which seems to retain the Raptor I/II or H2/H4's 600 kg warhead, while also incorporating an air-breathing engine for cruising).
In fact, I like this Raptor 3 design a lot, seems the folding wings give it a very sleek or thin profile, which means it should theoretically fit under the JF-17's wings.
Plus, besides using our own LACM seeker tech, we can retain the EO/TV seeker of the H-2/H-4 for very precise terminal-stage guidance.
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@Gryphon