I use both. The ET-732 is a little finicky, I agree. It really only has an advantage as a pit probe due to its higher temp rating. I found it works best with a 22k biasing resistor instead of the 10k one for the ET-73 probes.
If I had to just buy all new probes again? I'd just use the ET-73 ones, they work very reliably and provide ample temperature range for a smoker.
dave