Oxiclean instead of PBW?

Quality is seldom less expensive

I prefer the alkaline because I have a very small water heater in my garage/brewery.  Can’t get enough to clean a keg, so the cold water effectiveness is important to me.

If you are trying to save water the ability to rinse off cleanly is important, too. I do try to capture and re-use my rinse water, but the fewer rinses the better. I don’t know how any of these products compare on that basis.

I’ve used Oxi, PBW,  and both versions ofnCraftmeister. Oxi takes rhe most rinsing, with PBW almost the same but a bit better. The Craftmeister stuff takes the least rInsing.

Does TSP remove beer stone?

No, you need an acid for beer stone.

No argument there, but sometimes your budget forces you to choose.

Yep