Differences in edelbrock rpm lower to rpm II lower?

Anyone know the actual difference between an rpm and rpm II lower?

I know for a fact that the ports between the uppers and lowers are identical, because you can use the rpm I spacer on both (yes, i've seen this in person)

Edelbrock claims the lowers are different but on the phone they couldn't tell me why or how.

Well, in comparing pics, looks like the II has 2 extra bolt holes drilled near the center that aren't drilled on the rpm or perfromer lower.
But Looks like there is no real difference, noticeable to the eye through pictures.

I know the intake spacers are perfectly identical because when my mechanic installed an rpm II on a car back a while, they needed a spacer to clear the valve covers. And none was availble yet, because the II was new at the time.
So they used a rpm spacer, and it fit perfect. Less the two bolts in the middle, That don't really connect to the runners.

It was also hinted to me, that edelbrock, just drilled those 2 holes, and said the intake was different so they could get more sales and ask more money for the II. Instead of just selling the upper.

Dub's, i'll have to check that issue out.

Looks like i'll just have to replace the whole thing.