which wifi?

i have 2 wifi cards and since i am planning to sell out one of my jornadas with one of them, i was thinking about which one should i keep for myself? or does it matter anyway? we are talking about entrasys roamabout and linksys instant wireless. both cards came from usa as well as the jornadas. should the fact that i am in europe make a difference for my choice? i mean for standards, frequencies etc.