The official page highlights more differences: https://www.crowdsupply.com/lime-micro/limesdr-mini
This is incorrect, and it is the source of much pain. The chip that provides the ADCs and DACs, the LMS7002, has an input range of 100kHZ to 3.8Ghz but the design of the LimeSDR front end filter banks made its minimum usable frequency with decent SNR about 200Mhz[1]. Initially you couldn't even pass a tuning frequency below that through the API.
Even with the vendor/factory supplied "fix" the LimeSDR has a hard time getting below 100Mhz.
A lot of people read the chip spec and expected the card implementation to be able to do the same, they were unpleasantly surprised to find out that was not the case. Hence a lot of griping early on. On the plus side, since it was deaf to the FM band it was more sensitive to higher frequency signals. Other SDRs like the SDRPlay RSP2[2] are actually quite usable down even into the AM range (500Khz - 2Mhz) and have a notch filter for the FM band to keep it from swamping the input and eating up all the dynamic range.
[1] Firstly, we would like to highlight the fact that it is not possible to achieve optimum performance across the entire operating range of LimeSDR — all the way from 100kHz to 3.8GHz — with only a single matching network. -- https://myriadrf.org/blog/optimising-limesdr-matching-hf/