I picked ScarfTran because it fits our team better. Yes, I do realise that Heatran is giving Kyogre free switch-ins, but I think Ho-oh is a much bigger threat to our team than Kyogre is. Without hazards and sun up, it's going to come in again and again to fuck with our team. Kyogre at least can be semi-lured in and disposed of with Draco Meteor (or weakned massively), and we have a usable check in Water Arceus. Ho-oh, on the other hand, we have absolutely nothing to check it with apart from Groudon, which risks getting burned by Sacred Fire and could just end up getting Stone Edge stalled out and then would be completely useless. Heatran at least, gives us a usable Ho-oh switch-in that can at least reliably beat Ho-oh once. Terrakion cannot beat Ho-oh reliably at all. It cannot switch into Brave Bird, or Sub, while Sacred Fire has 50% chance to burn it.
Whatevs sig. QC member for OU and Ubers, VM me for a look at your analysis. Just make sure it's good.
Also, if you want me to rate your team (OU/DW OU/Ubers), give me a VM. If I don't rate it, it's either 1) it's so shit it's too much trouble, 2) I'm busy, or 3) the team is fantastic and I have nothing I can suggest to you. You should be able to recognise which one.