You may be new but you already know a lot more than most. Large panels limit you. Size and individual cob height is fixed. You are also stuck with on or off on the entire light. The singles can be arrranged in any configuration and can do so forever. If your space changes you can move them. Take one to veg or take 2 and use them to flower. However you can imagine it, it’s possible. You can also unplug cobs as you start out and plug them in as your plants need more coverage and intensity.
Apples to apples the Autocob is tough to beat. Dollar per watt it’s very competitive and similar price to some diy kits available. Cobs, heatsinks, driver, frame and of coarse your time. Nevermind the part where you have to learn what’s what and how to wire it all. These AutoCobs are complete ready to hang lights with a decent coverage area. 16x16” minimum and 24x24 maximum. Generally I recommend 4 for a 3x3 and 4-5 for a 4x4 space. As a comparison these deliver about 2.5 times the light of most red and blue led lights per watt.