25 mans are easier for quite a few reasons. I don't know a raider that did both 10 and 25 mans at a decent level (let's say top 2000) and says that 25 mans are harder.
And people don't even complain about the amount of gear you get in 25 mans. They complain about the shit gear in 10mans.
We didn't have a holy paladin or an agility leather user last tier and guess what, all the loot was just that so we had to DE it. I myself went ~4months without getting a new piece of loot, pala/priest/warlock tiers were simply not there and my first heroic item dropped in the last week before ToT.
We finished our heroic "progression" at ~494 guild average level and our highest ilvl was a monk, a healer monk... he had 507 ilvl ON HIS DPS OFF SPEC GEAR and 490 on his main spec.
I don't give a shit about how many items 25mans get... but when we have healers and tanks forced to go into HM''s still with blue and later in THRONE OF THUNDER HEROIC still with fucking 471 blues it kinda of hurts you >.> . I'm fine with getting 2 items off a boss but please for the love of god make them useful.
We are currently making our 3rd pair of boots with Haunting Spirits.
That's 20 (sold 2) items DE'd out of 36 boss kill (72 drops)... that's almost 25% loot that gets thrown away in 10mans >.< .