[Kaldur thinks about that for a second. Koushirou had not mentioned that form of evolution before and it also made Kaldur wonder about the possibilities and perhaps powers that the digivices might have. He'd have to look into it at some point, but technology wasn't exactly a strong point.]

It sounds like it boils down to factors that determine any fight: team work, strategy, tools, and experience. I'm not sure why the digivices are different, perhaps one of the other chosen would have a better answer for it.