When two boats share the same hull type — in this case both the Manitou Pontoons 18 Oasis 2 Tube 2009 and the Manitou Pontoons 20 Aurora VP 2012 are pontoon designs with inflatable construction — 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 — Manitou Pontoons 18 Oasis 2 Tube 2009 at 18,0 ft versus Manitou Pontoons 20 Aurora VP 2012 at 20,8 ft. At 156 lbs and 195 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 150 hp, the Manitou Pontoons 20 Aurora VP 2012 has a 75-hp advantage over the Manitou Pontoons 18 Oasis 2 Tube 2009's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Manitou Pontoons 20 Aurora VP 2012 carries 24 gallons versus 2 gallons in the Manitou Pontoons 18 Oasis 2 Tube 2009. 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 Manitou Pontoons 18 Oasis 2 Tube 2009 is rated for 8 passengers, while the Manitou Pontoons 20 Aurora VP 2012 caps at 1. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Manitou Pontoons 18 Oasis 2 Tube 2009 could be the deciding factor.

Both are 2-tube and 3-tube pontoon designs respectively. Tube diameter and gauge affect stability and load capacity — more so than most buyers realize when comparing on paper.