those IC you are pointing to are not even worth considering... unless maybe if I had a customer who would like to get designed a bms for an impact drill or similar device with a predetermined too expensive IC. I'd rater go with bqxxx from TI instead for such application.
LTC68xx are not that expensive when you buy directly from linear and when you consider their caracteristics, they are still the best option out there. Slave boards require isolation and have
method to communicate to other IC over the isolated channel. Most cheap monitoring IC won't have this feature built-in and you will quickly see that external isolation device will cost a lot more+more parts and less reliable.
LTC68xx are not that expensive when you buy directly from linear and when you consider their caracteristics, they are still the best option out there. Slave boards require isolation and have
method to communicate to other IC over the isolated channel. Most cheap monitoring IC won't have this feature built-in and you will quickly see that external isolation device will cost a lot more+more parts and less reliable.