engine temp sensor specs

I decided to try one of the newer replacement sensors I bought with the lower resistance compared to the original one. As I expected the gauge reads higher than the original one for 180. After years of looking at the 180 point with the original sensors the higher reading does bother me some. The original one was right around the start of the barred range on the temp gauge and the new one is aound the "M" in Temp. Since both new sensors were lower resistance than the original I'm thinking this is a reproduction parts thing, not always exactly like the original.