The PEX A system is faster once you get used to it. Initial cost is higher.
Next fastest is the stainless crimp bands, they are faster than the copper bands, because you can do all of the band sizes with one tool. I’m getting ready to re-plumb my house, and bought a tool to do them at home.
We’ve been using Apollo crimpers, and copper rings about thirteen years with no issues at work. But they are a bit slow to do. Becasue we have the tools with a set of dies for each tubing size, and you have to switch them out to change sizes. Which if you’re doing production is fine, do the big stuff first, the switch dies and do the 1/2 inch. Finally run any 3/8 that you have to. In repair work it can get to be a hassle.