The latest M2 13” (technically 13.6”) has the same exact design as the new 15” if I’m not mistaken?
You are correct, but I think they were talking about the 13” M1 (old wedge design) not the 13” M2 (new design).
It's hard to keep track! I'm just looking at the Apple site now and see this:
MBA (M2) 13"
Height: 0.44inch
Width: 11.97
Depth: 8.46
MBA (M2) 15"
H: 0.45
W: 13.40
D: 9.35

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Those dimensions don't look like the same to me. The H is pretty much the same, but the W is 1.4" more, and the D is 1" more. Maybe I'm missing something?