I personally do not think it makes a difference either way. The deer stand and stare at my IR cams just as much as they stare at my white-flash cams. If you have food or some other attractant down, they will really be more focused on that anyway. I really prefer white-flash cameras because I like the color night-time pics and you don't have the issues IR cams sometimes have with transitioning from daylight to dark.
Blessings......Pastorjim