Regards, Nandric: It gets even worse. In 1980, Acutex offered seven carts with (other than color) identical apperance. There were the LPM's (four models) and also the "Standard Series" M206-11 (white grip, conical), the M207-11 (grey, .3 x .7 ellipt.) and the M210-11, (orange, .3 x 7 ellipt., but keep in mind this was not the orange .3 x .7 LPM 310e "Best Ellipt.") These are not to be confused with the big block M3xx carts. It's all so simple---
As to your bigger is better premise? Really, Nikola. As Sun-Tzu might have said: It's not the size of the army but rather the fury of the attack that counts ;^). This is (informally) reflected in that most of the carts mentioned above are relatively low inductance/output impedance designs and of less than 3.6mV output. Mostly. Another needing mention is the Signet TK10ML, 2.2mV and the cart that introduced the ML stylus. There are those who hold the TK10 in high esteem.
Peace,