Both the Eastern 18 Center Console 2008 and the Eastern 20 2012 are modified-V designs, the first built in composite and the second in fibreglass, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department - Eastern 18 Center Console 2008 at 18,0 ft versus Eastern 20 2012 at 20,2 ft. Weight tells a clearer story for trailering families: the Eastern 20 2012 tips the scales at 1 500 lbs - 275 lbs less than the Eastern 18 Center Console 2008 at 1 225 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
Both boats share a closely matched power ceiling - 90 hp for the Eastern 18 Center Console 2008 and 90 hp for the Eastern 20 2012. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Eastern 20 2012 carries 40 gallons versus 28 gallons in the Eastern 18 Center Console 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Eastern 20 2012 is rated for 6 passengers, while the Eastern 18 Center Console 2008 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Eastern 20 2012 could be the deciding factor.
Bottom line: Choose the Eastern 20 2012 if your priority is putting more people on the water - it handles 6 passengers and at 20,2 ft it has the deck room to back that rating up comfortably. The Eastern 18 Center Console 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.