If so, older or younger?

E has 4 older cousins on D's side (all boys). The youngest of them is 5.5 years older than E. He sees all four on a semi-regular basis.

On my side he has 13 older cousins and one younger. The younger one is only 2 months younger and they'll (hopefully) meet for the first time this June! He only sees two of these cousins on a regular basis.