Duplicate post. Moderator please delete

So I've owned a number of polymer, striker-fired guns -- S&W, FNH, Sig. Looking at my SD9, I cannot see any significant difference in quality of the key parts and the overall build.

The striker, sear, and related parts are quite elegant in the Sig P320, while the analogous parts in the in the SD9, M&P9, FNS-9, and Glock are not so sophisticated. But in the latter guns, they are still reliable and provide reasonably good triggers. [I am putting aside from this computation the longer and somewhat heavy pull of the SD9VE trigger, which I will mitigate with an Apex kit later, plus practice].

So my question is, why buy an expensive striker-fired polymer (plastic) gun, when I can get a SD9VE for $275? Are the barrels, springs, plastics, magazines, etc., better on the more expensive models? My experience with my SD9 is that it has worked every time I've pulled the trigger (which I cannot say about every other pistol I've owned, expect the classic P-series Sigs).

This is sort of a rhetorical question, but I am also interested if anyone has any experiences or observations that can pinpoint a quality difference between the SD9VE and the classic $400-650 striker-fired plastic pistols that dominate the market. (I know and appreciate the difference between this range of pistols and the next level down, the Kel-Tec, Highpoint, Jimenez, Diamond, Taurus, etc., type guns). I am working myself up to buying another SD9, and believe I will get a level of quality comparable to the more popular -- and expensive -- quality pistols.

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S&W Rover