Hi,
I've had the ET4410 twice and an ET4510, so I know it a bit.
The ET44/4510 are ideal for people who don't want to/can't spend much, but want more than a handheld LCR could offer.
The workmanship is appropriate for the price, but it doesn't seem cheap.
The accuracy with regard to the basic parameters is very good; the second parameters are to be treated with a little caution with increasing frequency.
And that's where we come to the point where I have some skepticism about the second LCR meter.
100kHz measure frequency is not easy to handle, and beyond that, above 100kHz, the measurement circuit must be more complex.
This then affects the price, so without knowing the device, I don't think you can effectively use the 300kHz offered by the NJ300S.
LCR meter with 300kHz measuring frequency. The best value for money is the ET3503 with an average price of around €1000; all other brands are significantly more expensive and cost several thousand euros.
In that case, the $190 seems very daring.