Quoting iceman69510:
Brad, do you know if they actually use different type pins from 1g--> 2g?
They are not the same terminals between the 1G and late 2G style connectors, the connectors are not even from the same manufacturer. Whether or not you can use them, I don't know.
Spoolinup was selling another squeeze type connector that was similar to the 2G, but not the same. You could use the 1G terminals in that. And I think it was a cheaper option.
I've seen the downsides of using the wrong terminal in a connector. Improper terminal retention, poor contact with the mating connector, etc. I would be wary of doing that, but I am sure Spoolinup has done some real world testing on this before saying it is OK.
Before doing that, I'd consider using the 1G connectors, and making a quick release connector somewhere else inline.
Edit: I think the pic that Flying Eagle posted, shows the Spoolinup type of quick release injector connector. It is slightly different than the 2G.