[Argess]

Inboard brakes give you less (better) unsprung weight.

Inboard brakes can be difficult to keep cool under continuous hard use (racing)

So, performance sort of balances out

Maintenance on the other hand.......

I think I'd remove the whole rear cage and work on it then if it were discs or calipers needing attention. Just pads, I can probably do it via the access panel behind the seats or posssibly from under the car.

By the way, I don't think ERA offered the outboard brake rear end when I bought my car, but it looks like a nice option.