The Hana SL is a great cart — especially for the cost - I use the mono version as my daily driver. I’ve used it in a few configurations. When the resistance is pinched, it tends to smooth out more than it already is. I think if you’re starting out, just understand you don’t need to get too hung up on the numbers. They are a guideline and most systems have too much gain anyway. Regarding loading, once you get about 3x the internal resistance away from the input, which you at with 100ohms, the changes are subtle, more about preference and less about right or wrong. In my option, when this cart is pinched, it will sound more like the reviews say it sounds. So if you like the reviews, I’d go for it. The ML is a different animal - need to go by the book with that one
A quick google search - Analog Planet said this about the SL, which I’d agree with:
The measured response differences between 100 ohms and 400 ohms was not significant but what was consistent throughout was a slight recess in frequency response in the upper midrange over a wide expanse of frequencies. And that is clearly audible. It’s what gives the SL such a pleasingly relaxed yet detailed sonic signature.
Like I said - more of the same.