>>933857Engine has better shoreside opportunities, plus people know what an engineer is (but really you'll be a glorified mechanic).
Deck has a generally easier job, a little more responsibility, you can eventually be captain, and the more romantic traditional seamanship skills.
It really comes down to preference. The few people I know who have both licenses sail or have sailed a good deal of time as both, so either is obviously worthwhile.
Do you have any more specific questions?
