Both the Formosa Marine GRT 425 Tiller 2027 and the Formosa Marine GRT 455 Side Console 2027 are V-hull designs, both built in aluminium, 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 - Formosa Marine GRT 425 Tiller 2027 at 14,5 ft versus Formosa Marine GRT 455 Side Console 2027 at 16,1 ft. Weight tells a clearer story for trailering families: the Formosa Marine GRT 455 Side Console 2027 tips the scales at 871 lbs - 154 lbs less than the Formosa Marine GRT 425 Tiller 2027 at 717 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 90 hp, the Formosa Marine GRT 455 Side Console 2027 has a 30-hp advantage over the Formosa Marine GRT 425 Tiller 2027's 60-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

Both boats are rated for 4 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.

At this size, power-to-weight ratio matters more than outright horsepower. The Formosa Marine GRT 455 Side Console 2027 comes in at 10 lbs per hp versus 12 lbs per hp for the Formosa Marine GRT 425 Tiller 2027. The lower the ratio the more explosive the acceleration - meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.