As with any of the mold makers they bounced back and forth with multiple drive band widths.A link to a picture of the original h&g #68 mold.
http://www.hensleygibbs.com/molds/68.jpg

A link to a picture with A "real" cast h&g #68 next to a rcbs 201
Reloading Cast Bullets For The .45 ACPGuns Magazine.com | Guns Magazine.com

The link above clearly shows equal drive bands.

I've seen/owned h&g molds that had the equal drive bands and the original offset drive bands.
A link to another popular target bullet that h&g made molds for, the h&g #130. It has a smaller nose then the h&g #68 and weighed 185gr. It also has the large bullet base and the smaller drive band.
http://www.hensleygibbs.com/molds/130_6.jpg

H&G also made a "heavy" version of their h&g #68, these are extremely hard to find. Instead of making equal drive bands for more weight h&g made an even longer bullet base to increase the weight og the 68S (heavy).
http://www.hensleygibbs.com/molds/68S.jpg

A link to a search using bing, it has pictures of the h&g #68 bullet with the equal bands and a bb.
h&g #68 bullet - Bing images

So when the OP asked about the difference in the 2 molds the answer is:
The 201 has equal drive bands & rcbs's new mold has a large bullet base and a smaller top drive band.