Actually the difference is pretty minimal. You can break down the old damper by taking the butterfly and arrestor out and wrap it around the rolled pipe. This is effective. The new one, you can still wrap it around the pipe for storage, even with the butterfly in, it just extends the length of the cylinder by about 1.5 inches. If you take the butterfly out, it reduces it to about .5 inch of overage.
The butterfly is harder to remove, really due to the extra collar length so it takes a bit more wiggling. The spark arrestor is a lot harder to get out.
In my opinion, I would not mess with it, I would deal with the extra 1.5 inch of cylinder on my pipe. That is the simplest way. In reality you are increasing pack volume by CI by about 10 inches ((1.6 * 1.6 )* 3.14 * 1.5) . a couple minutes of fiddling, to save 10 CI, is not worth it to me. I'll take the simple functionality.