Originally Posted by
tibbee
It really depends.
-A death in 10 man is more costly than a death in 25 man, because you have 1 combat rez (10% of the raid) compared to 3 (12% of the raid) in 25 man
-There are all kinds of mechanics where a single person can wipe the raid by screwing up a mechanic. Defile is the classic example. These types of mechanics are FAR more punishing on 25 man, because it is a lot easier to have 10 people execute a raid wiping mechanic than 25, and it's 2.5 times more likely that you will have someone lag or DC or something (probably more like 5 times more likely with the greater system drain of 25 mans) causing a wipe to that type of mechanic
-Any mechanic where you need to be spread X yards apart to avoid chaining/splashing damage is far harder in 25 man than 10 man because you are fitting 2.5 times as many people in the same amount of space leaving less room for error
-10 mans are more prone to RNG based difficulty where X number of players can get targeted with something. An example would be Sinestra and cutters; if you only have 2 healers and they both get targeted, it is almost unrecoverable (which is why they changed that mechanic on 10 man); if you have 6 healers and 2 get targeted, the other 4 can pick it up.
Both of the previous tier end bosses (Rag and Spine/Madness) were far far easier on 10 man than 25 man, having done the 25 man versions, 10 man felt like a joke. 25 mans may have had the first kills and more high ranking kills (just like there are currently more 25 man HM Sha kills than 10 man), but that is honestly caused by the fact that the majority of hardcore raiders prefer 25 man guilds, and top 25 man guilds tend to have more talented players overall than top 10 man guilds. I have not done any T14 10 mans, but having done every boss in T11, T12 and T13 on heroic in both 10 and 25 - the only fights you could argue are harder in 10 man were Hagara and Sinestra (until the healer target fix and until you had the DPS to 3 heal it). Every other fight was noticeably more difficult in 25 man.