Base shield v2 AND Seeed BLE Shield v1 Compatibilty

Hello everyone, I would like know some information,
Do you know if Base shield v2 http://www.seeedstudio.com/wiki/Base_shield_v2
and Seeed BLE Shield v1 http://www.seeedstudio.com/wiki/Seeed_BLE_Shield_v1
are compatible together on Arduino?
Can they coexist?

thanks in advance!

Davide