I think the missile tubes amidships are a better comparison for size. Looking at those, the image scaling seems fine.If we assume that the VLS of both frigates are of the same dimension, then type 054B should be larger than in the picture.
Red lines are length and width of type 054A, yellow lines that of 054B.
View attachment 144462
Is it possible that the VLS has simply changed dimensions? If so, is there any change in the missile complement that can be fielded?