Cable is a shared coaxial plant. Evening slowdowns are normal physics. Fixed wireless (what isp.net operates) is a directed radio path. It fails on foliage, buildings, and weather in ways cable does not—and it does not wait for a trench. It is also not the same product as 5G home internet from a phone carrier.
Choose cable if the plant is healthy and the contract is clean. Choose wireless if the wired options are slow to build, capped, or absent. Details: fixed wireless, HomeNet, BizNet.