The first generation of Crossovers had a trigger that was heavier with a stiffer spring. But there was a free upgrade released to change the trigger to the newer version, and all stock released from that point on would have the new trigger. This is the same trigger that the XVR has. If you were trying an older Crossover that did not have the free upgrade, the trigger would feel stiffer and heavier than the current one. That said, without the spring is like 3x better with both the old or new trigger.
A kid at my field has/had one, Maybe he had this Stiff spring because I wasn't impressed at all. That's just me though. Playing for 8 years and working at a field I get to shoot the latest and greatest, so maybe I'm a little biased. Also, hes a kid and it was down all the time, perhaps it just needed a good once over to get it going nice.
Doiing a bit of snooping I dunno if it was a standard or an xvr, I know it was ano'd green though. He'll probably be at the field today so I'll ask him.