Well it depends don't it? Last night was a great card, but turned out far better than I think anyone expected. SHO can't get all the credit for guys boxing their hearts out. I tend to watch the heavier weights - 160+ and here HBO and TR basically dominate. With some classy recent Top Rank signings at the lower weights, it looks like its HBO/TR looking to move in on SHO territory if anything. I don't think HBOs in any danger of getting pushed outta boxing any time soon, 'cos BHop aside SHO has next to nothing to challenge at the higher weights.
HBO is far superior and could buy Showtime with the change that has fallen on their floor. Showtime better make some money with the Mayweather event or their bosses at CBS will cut their boxing budget real fast.
HBO aren't infallible, ********. They're going through their own struggles right now and budget cuts. Showtime is making all the right moves at the moment.