Yeah EU siege is better. Yesterday I started building some siege gear on top of a tower. Another engineer turned up and started helping me. 2min later I relised he was on the other team. I thought meh, and went on with my business.
We made a spawn point, healing tent and catapult. Then blocked up the stair way and began killing people as they tried to take over our precious roof. He killed my team and I killed his, boy it was stupid and hilarious. The funniest bit was it wasn't until he killed one of my team mates that I worked out he wasn't on my team, rofl for being a dumb dumb.