Options, a choice needs to be made, however
I cannot imagine hearing differences of any significance like OP mentions, and the numbers given to OP by his equipment maker do not seem right.
you cannot hear specifics, without not hearing other specifics at any one time. I try hard, and prefer getting others involved to prevent hearing what I want to hear, or simply my brain choosing to hear this this time, then hear that next time. And I try to delay decision making final comparisons until after break-in periods,
IA (imaging Ability) and SQ (Sound Quality) are separate but equal. A combination of wide channel separation and very importantly tight channel balance is desired for imaging.
What x factor for decently strong/not too strong signal strength? Downstream volume controls/tubes working easily? Noise free, great! Similar to other source input signal strengths, IOW, it's a copacetic/relative rather than SQ decision
next, load, is it near the 'general formula' coil impedance x ten, in this case 1.4 ohm x ten = 14, the 1:40 x factor (a very high ratio) yields 29 ohms, close enough. What is the signal strength ____? and resultant x40 signal strength _____?
Settings basically correct:
AFTER you break it in: If it isn't already wonderfully INVOLVING playing very familiar content, go for a different cartridge.
If it doesn't produce great imaging, I would not bother, go for a different cartridge.
refining loading IME is subtle refinement, hard to positively discern, and in my case 4 optional loads are related to the 4 optional xFactors, so there is always a signal strength change too.