First I wanted to clarify for
@APL76 (since he is new) that, I am only a practitioner of WC, not an expert BUT I believe I am being asked this question because I also have a fair amount of previous Aikido experience.
That said yes, it is similar. Example in the WC I study it's not just about getting to the blind side. I was actually pleasantly surprised when I found that the principle of footwork in WC also applies to defense in a way similar to Aikido. If we do not move, ultimately we are still using force against force. You may be able to deflect a fair amount of the force but you can never deflect all.
The idea is that force moving forward is always more powerful than a static target's ability to receive it. Just using a structurally sound stance is not enough to receive that force and even if I successfully divert the force of the first attack, that took a lot of my personal energy and the next will hurt even more. So you use footwork, not just to get to the blind side for a superior tactical position for attack but also to assist in defense. A simple use of footwork as your bil sau (tan, bong, gan, whatever) diverts an attack absorbs far more force than either remaining static or worse, insisting on moving up the middle and directly into the attacker's "kill box.". The bil deflects a fair amount of energy and the fact your release step is "going with the flow" diverts more. Very Aiki imo.
I put these two together because it is illustrative of what I think is an argument falling into semantics. Let me explain in a bit of detail. First picture the master's wheel I linked previously. Yes there is a point to the target where your footwork may move in a literal circle but once inside a specific range your foot work is linear BUT stop looking at the footwork alone for a moment and picture just the heads of the two combatants moving with each other. It can easily be seen like two bodies in orbit... Meaning circles.
Also
@Kung Fu Wang noted a part of the principle of centerline theory, followed by what that + fighting on the blind side enhances...
Now some may say instead "attack and defend simultaneously with both hands" instead of the first part of his statement but for practical purposes the mean the same thing. Then in the second half you have the portion of centerline theory which says a goal is to disrupt your opponent's center so he can not do the same.
The issue is some "schools" of WC teach that you can move to the blind side on your own as well, not simply rely on your attack to force the opponent to give him your blind side. I believe
@APL76 is saying through the use of proper footwork we can move ourselves to the blind side, I just think the use of the word "circle" has created a false conflict and that we are all actually talking about the same thing. He even said "circling footwork" of two of the forms in his one argument followed by it doesn't mean you have to move in a circle.
I think I understand what he was trying to get at there. Even if moving to the blind side we want to be moving forward, even if "only" on an angle, so that we can use that forward momentum to produce power. Thing is one can argue that this is moving in a circle. I remember LFJ critiquing my lineage when he said he watched a bunch of videos and believed our strategy of trying to get the blind side resulted in us walking in circles as our opponent would constantly readjust but I see it as working the angles... semantics.