Arrow Vs Flash

Does anoyone else recall these promo videos. I recently stumbled on them again and i can't pick a favourite. So I thought I'd see what you guys pick, which do you like most?

If you've never watched the promos you can find the vids below cut.

The discovery of Ronnie and Professor Stein's fusion and seperation was handled over two episodes in season one of Flash, which episode did you enjoy more?

Both heros faced a similar experience of having to face the ghosts of those they'd 'failed' in some way but which episode was better?

They went though a lot together on the show until death seperated them permanently. Does this make you perfer to see the couple together romantically, more platonically or not at all?

Which Earth-2 version of Team Flash is your Favourite out of the bad guys?

Heading into Season 2 did you expect these characters to die. Who's surprise Death where you shocked by the most?

Soon they'll be heros too but they've (most of them) have to get there first. But who did you like best from these future heros?

The side couples of the shows didn't fair well in the opening seasons, but who had it worse?