YRB is a PVE routine and shouldn't be compared to PVP routines like Tuanha's, for the classes supported it will greatly out perform Singular.
that's one of the few things that was very surprising to me is how little objective testing there's been posted reviewing performance of all these CR's (i'm relatively new to botting, but a hard-core nerd hardware techie who spent years posting benchmarks on hardforums, anandtech, etc., so i believe in benchmarking). It's a big project to be done right and has to be done by someone who has a good understanding of the game mechanics and a little bit about coding. the devs themselves would be great at this but they're busy enough trying to just perfect their projects. i've started compiling parses of the most popular routines since i'm a pretty veteran player, but then the entire HB world just became commercialized so pretty much all my parses were useless cuz new premium versions are available for everything. i'm restarting my project soon though and have now purchased almost all the paid routines that were free before. this is the type of stuff the community needs that just doesn't exist right now other than a screenshot here and there of a random encounter some random user got a huge number on. i will at least get some of my favorite classes more thoroughly tested and posted once i have time with real numbers and warcraftlog charts (u can see everything the CR did wrong).
i have made a lot of comments about Tuanha routines since i have a LOT of experience with them since they were the first ones i bought and was still PVP focused when I started botting fairly recently. they are amazingly high output designed for pvp where u want to kill/burst games over in seconds or minutes but they are very, very customized to how you want them to perform. i was 14/14 normal SOO the 2nd week i ever entered the zone in full prideful since i was a pure PVPer for years - multi-class duelist since Illidan won the nationals all the way back in BC. i did this with basically every tuanha class which the entire forums says is impossible to PVE in (and not overgeared), so needless to say there are many misleading generalizations from people who never really tested products who will give you feedback. if a noob raider like myself who hasn't stepped into a raid in years can do 14/14 with basically every Tuanha routine there is under-geared by today's standards, it means it performs fine if you actually understand the CR and the game. i know for most of you raiders 14/14 is trivial, but it definitely is not trivial in mostly prideful gear in PUG's over Oqueue, it still takes quite a bit of effort people are so bad now, and even a boss from several months ago takes a few wipes and kicking and replacing horrible players to beat the boss.
i will try to make more specific comparisons soon between these products, just wanted to correct some generalizations that may not be the most accurate before proven. the testing i did the most with with a raiding dummy with enough hundreds of millions of dmg was with warrior routines (my first PVE class that i easily went 14/14 as dps and prot in Tuanha CR's), but this was before FU2, which i'm about to buy and test too. my old results are useless now since there are better commercial products that nomnom recoded (he is pretty amazing at what he does). my old tests although worthless now will surprise most of you - FU1, Tuanha, and my auto-fire logitech macro that just smashes many buttons on CD without using a bot but only 1 auto-fire key and few mouse buttons were all within a few percent (close enough i'd call RNG close), but FU2 is supposed to be much more fine tuned. last night my latest garrosh kill was with Tuanha Mistweaver, again I'm sure it took a lot more intervention from me since it has no encounter mechanics encoded in it, but performs very well if you actually want to play your toon.
TLDR: if you actually want to learn/play the game, any CR that has lots of options works wonders (Atilla just added a few I requested for his kingwow resto shm which he hasn't touched in months and again, going 14/14 was totally feasible since it's very customized (i'm only 556 in half prideful which most groups would kick before they even start the encounter if they inspect you). i personally enjoy high output routines that have no encounter specific coding so i can actually semi-play the game myself other than the crazy button smashing. if you want the bot to do everything for you (Millz even forces you to stop attacking Nazgrim in defensive like a noob would
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and his products are the best encounter specific coded ones I've used so far), wait till more feedback comes from these new premium ones designed to play the whole game for you. but if we're talking about raw output, give it some time and you'll soon see real parses to backup these generalizations about A sucks for PVE, B sucks for PVP, etc, etc. not all the general statements you see are true.
and last thing, if your goal is really to just farm and level, get legendary cloaks through chain LFR's, capping valor each week, etc, people don't give Singular enough credit. it works GREAT for this and you don't WANT to top the charts and get whispers if you're AFK
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I use Singular quite a bit when I'm not sitting at the screen cuz that little 10% difference or so actually makes you perform more like a real player. Singular deserves more credit than it's given, it's there for a purpose and serves it very well.