You're asking me to defend one part of the article that's erroneous and citing another part that's also erroneous.  The Walther PPK came about AFTER the Sauer 38H, the pistol on which the SIG P230 and P232 owe their parentage.  In fact, all of the above mentioned pistols owe their existence to two unmentioned pistols, the FN 1910 and Little Tom pistols.  They are both derivative and both developed in parallel.