@Deadlock i understand your arguments for UGR but since i play both lists about a bit more than a year now (90% tournament experience) where i've learned that UR plays the control strategy better because everytime we drop a Tarmogoyf we have/want to protect it so even if it catches 2 hate spells which could have targeted the dreadnought normally without countertop in action we also waste 1-2 counters to protect it (not on every case but most of the situations i want to keep goofy).
About Goyf and "wasting" counters, how could you generalize such a thing?
It depends on your hand and the gamestate obviously, but the given you have Stifle and Nought in hand and the circumstances allow you to go for Nought, you DONT have to protect Goyf, he's just there to trade 1 for 1 - a simple term of leverage. Thats the good thing about him, you wont fall behind in terms of ca if he gets removed and if he sticks, well..

You cant say the Ur has a better way of abusing Crucible with one additional Mishras. If i expect the mirror and Landstill i happily put two Crucible in my Ugr board.
I am not convinced by Rushing River in your maindeck, i see that it is good in tempo decks like Canadian ThreshThreshThreshThreshThresh and while Dreadstill can play the tempo game, it can also play other roles (in which Rushing River is not that good).
Definitly cut a Standstill and add a CB!
Also think about some GY hate in your board, about Hibernation - isnt it a bit narrow? Eg it does nothing against Stax (Trini), Rood played Echoing Truth for that purpose.