Did you keep the settings the same on each mod? 375/9w and 445/30w?This is getting confusingI took the Doggy off the Sandstorm and pit it on the Jac, and it vaped fine. I put the Doggy from the Jac, and put it on the Sandstorm, and it's a very weak vape.
I'd break down both doggies and clean the snot out of each. Put them back together with new builds. Try again. I think you might have any atty issue more than a mod issue.