Common fallacy that offset will resolve this issue:
Offset is the realtionship between the centerline of the wheel's rim & the backplane of the wheel hub where it meets the brake disc. When a 3-piece wheel is built to different offsets, generally they are made from stock parts - the center disc (or spokes) & different sizes of inner & outer rims, which also conribute to the overall width. Generally, the disc is fixed, although some high-end vendors (as
ChrisK points out above) have alternative discs for large brake applications. When you change the offset it usually has the most impact on the outside lip size.
Picture the rim of the wheel moving across the top of the spokes, but the spokes themselves don't move at all with respect to the brake disc & caliper.
Applying spacers does nothing to correct the fundamental offset of the wheel - it just simply moves the wheel away from the brake hub so corrects the interference problem. Changing the offset design of a given wheel will move the rim out (or in) but still leaves the
disc of the wheel in the exact same position wrt to the brake hub. In other words, the spokes don't change shape just because the offset changes.
The interference of the disc to the brake caliper just comes down to that particular design so generally, unless that wheel manufacturer has a different array of spoke sizes, then it won't fix the problem. There may be some difference between a diameter change however as the spokes will differ slightly, even though they look the same.
The primary purpose of offset is to position the wheel/tyre in the correct location of the wheel-well. Narrower wheels have a greater tolerance for different sizes of offset, but wider wheels need to generally be "just right" as too little or too much will cause either interference on the inner fender or make the rim stick out beyond the body plane.
If you look at pretty much all NSX after-market rims, you will find it pretty much impossible to get a large lip on the front rims for this reason - if you get bigger brakes, that makes the problem worse. One typical example of this is the Volk GTC that comes in different "faces" for front & rear to allow a bigger lip. The discs look quite different when you see them together. See picture at the bottom
Excuse my rudimentary drawing
These are the same wheels but just with different offsets - you see the caliper still is in the same location wrt the wheel spokes.
...............Offset 1......................... Offset 2
