Hi there Pokerbanter,
These inahalers you mention, are they something like the one found here http://www.nicotrol.com/
If so, the website mentions that you may actually become dependent on this device just like with traditional cigs due to the nicotine in the solution it contains.
I would think that yes you could become just as dependent on ecigs provided they contain nicotine. But, a couple reasons that I prefer ecigs (vaporizers) over prescription inhalers is that you have so much more control over how your vape/smoking experience is.
By this I mean, you can find that perfect juice flavor/nicotine sctrength/throat hit/vapor production to ease the fack that you are not smoking real cigs. This way all you have to focus on is slowly cutting back on the nicotine strength until you are at zero nic.
I'm not sure how "satisfying" your inhaler is compared to a real cig but I know for example, the "cig-alikes' like Blu ecigs were too weak for me so I had to move into advanced devices where I could add my own juice that was stronger ans tasted better.
Once I did this, it was only a matter of time before I was forgetting to light up a real cig and then I just stopped completely because they tasted so bad compared to my vape lol.
But ultimately, I would think that if you compare your inhaler with a vaporizer/ecig with the same nicotine content they would both be equally addictive. You just have to decide, is your inhaler satisfying enough and/or is it becoming a financial burden that would warrant switching to ecigs.