Sitting and Sleeping options
As Tim points out, the cabin layout is completely different. Also, the hull design is different, as the 34T (late 70's) is much more of an IOR design (i.e. designed closer to the measurement rule), and the later (80's) E-34 has far less IOR hull influence -- especially in having fuller sections aft.
And, considering the cabin..., with the E-34T you get a more open interior of a "type a" design, with head forward and an open quarterberth area aft.
The later "tri cabin" layout with head aft and a larger aft cabin with a door requires that the companionway entry be pushed forward some and this in turn compresses the main entertainment area in the center of the boat.
Subjectivity Rules ! ...... Nothing wrong or right with either layout.
As i recall, both designs will give you a sleeping option that is
missing in most new boats in this size range: a choice of sea berths on either settee. If you spend a night at sea you
will appreciate having a secure place to rest on the off-watch. At sea the fore peak is often un-sleep-able due to the occupant being tossed into the air and then smacked back down on the bunk top as the boat moves up and down (& sideways) in a seaway. Aft berths are good, but that helps only one person.
I cannot speak for all the other Ericson products, but our boat can sleep three on the off watch: aft cabin and both long settees. Not a feature one needs very often, but when you do need it --
nothing else will do!
Regards,
Loren