Both the Tige 20i 2008 and the Tige Z1 2013 are modified-V designs, both built 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 - Tige 20i 2008 at 20,0 ft versus Tige Z1 2013 at 21,0 ft. Weight tells a clearer story for trailering families: the Tige Z1 2013 tips the scales at 3 714 lbs - 446 lbs less than the Tige 20i 2008 at 3 268 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.
The power gap is worth calling out. Rated to 434 hp, the Tige Z1 2013 has a 34-hp advantage over the Tige 20i 2008's 400-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Tige Z1 2013 carries 38 gallons versus 30 gallons in the Tige 20i 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 Tige Z1 2013 is rated for 10 passengers, while the Tige 20i 2008 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Tige Z1 2013 could be the deciding factor.
Bottom line: Choose the Tige Z1 2013 if your priority is putting more people on the water - it handles 10 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Tige 20i 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.