Equal right ? Not so much if we try supply and cok.
Supply is simple +2 mustering points for B and Cok is simple 2 tokens more for B.
So for A to be as good as B it needs to hit muster and got.
So we are left with deck 3 featuring 3 wildlings cards, web, no raid, no march +1, feast , no defense and sword picks. Wildlings B wins out on tokens, web is hard however you put it but worst scenario is supply clash web on A and supply clash on B is bad but manageable. No raid doesn’t make a big difference but never the les it is still B victory. Feast clash supply is another killer combo if you played A while if you played B you are most likely fine. Defense is another bad scenario for A because if you didn’t get muster you are losing your sea if stark doesn’t cooperate while with B you defend even if he hates your guts. Sword picks is already covered if we didn’t have muster and if we did you know who has it after fiefdoms bid so you can adjust bids on kings court better if you can bid more.
So clear winner is…
No You can force muster in 66% of cases and it is smart move sometimes even if you didn’t take kl but other westeros cards don’t look good.
Lannister who pick cok is either genus or madman and most likely he isn’t picking got either because it feeds Greyjoy a lot.
Still why gamble ?
Three things if it goes good you have a running start 66% of the time and second it gives you better position for next turn to grab supply while it is still relatively possible vs lanni in alliance with grey.
For the last point of advantage we will have to look at other houses who are anticipating B because let’s face it is better. They don’t go for castles ( Stark Martell) they collect tokens just like you would and then you 66% of time make muster and empower Tyrell and Greyjoy to take care of your problems for you.
This is why it is still sometimes picked when it is clearly suboptimal and brakes even only in best cases. Strategy will get you far but gambling o gambling can take you farther or ruin you. Hopefully if you fail someone will put you on life support and you can come back to even position you will have if you play B.