The two were completly different. To the point that such occurances would be little more than a cameo. I mean Crono spoke... C'mon.
Anyway, Break would probably clear up as to why there is such an occurance to the Trigger and the Cross. Why Lavos Triggered the m in the first place (Zeal as well). But the Dead Sea was an interesting part of Cross I'd like to see explained a bit more.