Every boat is different.............while some of you may feel V-drives are tight, that generalization is just not true all the time. Many v-drives have excellent engine space access. The major difference, aside from the interior layout is that the COG is further forward in straight inboards giving them better handling, but even that doesn't make V-drives handle or ride badly.
Don't forget, on many straight inboards, the main bulkhead is forward of the cabin entry, thereby putting the living area over the engine spaces. In order to reduce the odor of the mechanicals.....i.e. gasoline, diesel, crankcase fumes, transmission case vent fumes to a female's tolerance lever, you will probably have to work extra hard to keep the bilge clean.
The questioin cited is a rare one since seldom can you sea trial both an EC and a DA of the same model as he can here. SO forget forum answers.........go look at both and run them both, then buy the one that suits your needs and boating habits the best.