Having played both extensively, and started off with IS as my first mod, I would agree with the parts I have underlined and bolded, but not regards installation, the DMUC has an auto extracter so once downloaded it basically installs itselfThey are both good, although IS2 is smaller/easier/quicker to download and install.
Out of interest when did you last try DMUC?, I would strongly suggest that you take a look at the latest DMUC 8.0 beta, especially Naval combat
For those wishing a more unique experience in terms of unit/country than the majors I would also highly recommend http://www.twcenter.net/forums/showt...44#post8193344 Causa Belli an addition for the DMUC
As to which is better, that is down to preference and opinion - I like and play both, I play DMUC more.
But as Tango has also said there are a number of excellent MODs for ETW, try them and your own preference may not be IS or DMUC