Hi Yorksjt,
Appreciate a few people have commented, but feel the urge to add to it all.
I have a JetZ on my .300 win mag and a Roedale on my 6.5x55. I'm currently selling the JetZ and replacing it with a Roedale.
I can't remember the exact dimensions, but think the Rodale might be a fraction slimmer, but a tiny bit longer. It's not something you'll notice unless you start measuring though.
The JetZ is solid and will probably last a lot longer than the Roedale, given it's all steel. And, it can take a hammering if you want to use it on the range as well.
However, the Roedale is a lot lighter and, in my view, better suited for a stalking rifle. The balance is significantly better than with the heavy JetZ and as long as you don't do long rapid fire strings on the range, you'll be fine.
As people say, there's a lot of good options, also in terms of UK products (which I think is worth supporting) but I really like the Roedale mod.
All the best,
Christian