Having demoed both iems, I can tell you they differ much beyond tuning difference.The fact that SM, timeless and S12 use the absolutely same driver from the literally same factory in China, and SM is even more v-shaped than timeless and probably as much as the S12, I can't think of a reason to get this when something like the shuoer s12 is 120$ pretty much permanently(even timeless is just 200$). Through a bit of eq they can sound the same, and reshell s12 or timeless won't really cost much if you want to go custom.
EQ can help you achieve a similar tonality, but won't ever mimic the technical performance of what the supermoon is capable of.
What you are suggesting is akin to all BA iems with the same Sonion and Knowles BA sounding identical to each other if tuned exactly the same. Implementation is just as important as the driver that is being utilized. I suggest you demo the supermoon to hear the difference - and it won't even cost you a dollar.