When talking about batteries, there is a rated charge/discharge rate that the cells can handle safely. Sometimes this is limited by the built-in BMS and not the cells themselves. Generally speaking, the harder you run your cells, the quicker they will degrade.
Lead Acid batteries cannot produce or take power at rates as high as lithium and therefore typically have lower charge/discharge rates. They do not "perform" as highly.
One way that charge rates are referred to is the C rating. The concept is that a battery has a 1c discharge rate if it can supply its full energy in one hour. That means a 100 Ah battery can serve up 100 A for 1 hour. Typically Lithium batteries commonly can perform at 1c with bursts to 2c safely. This battery is limited to .5c with 100 Ah size and 50 A max continuous discharge rate. This is a potential red flag of either a bottom priced BMS or low cell quality or both - either of which can contribute to the lower cost.
