Colds, flu and Covid can all be caused by different varieties of viruses from the Coronavirus group, so there are definite similarities.
All can hit different people with varying degrees of severity, varying from severe and needing hospital treatment to mild and asymptomatic, meaning that the person may not even realise they have it. And every shade in-between.
I've only had Covid once that I am aware of. To me it did seem like a very heavy cold which settled on my chest, leaving me with a chest infection that needed antibiotics to clear long after the Covid infection itself had subsided. So, I can't choose.
I can't say that I give the whole thing very much thought now apart from having my annual vaccination at the same time as the flu vaccine every year. If I am well then I go out and about as normal, if not then I stay at home until I am better. As ever really, and I haven't tested for years even though they are still available in the pharmacy and online. I'm not buying.