What twist is that .40?
For years I been looking at the DZ Hep's but I keep putting them back because the drop of the stock. Not long ago I passed on a original takedown chambered in the .44-100 Straight and the change barrel was a .40 complete with heal sight base and sight, tools and wood box. The bores looked like new. I have a friend that had a Texas .22 Hep build I been trying to get from him

The prices of the Remingtons/Heps are dropping at a good pace these last few years and I think this why a lot of collectors are getting rid of some of these old pieces. Even the 74's are dropping in price.
As far as the Swiss and OE I treat them both the same and I personally don't see that there is a difference in performance between them.