I have paddled a lot in solo in both tandem and solo boats.  So many people go for the true solo for reasons.  Usually a true solo will have tumblehome in the center making it easier to reach the water without banging your knuckle on the gunnels.  The seat is generally lower making the boat stable but it will be narrower using up that stability. While we are talking about stability the boat that is stable for me (180 pounds) will be much less stable for you. Another way to think about it is weight below the gunnels makes the boat more stable weight above the gunnels makes the boat less stable. Most of the passenger weight is above the gunnel.
Let’s talk gear ratios. If you are on a 15 speed bicycle and it is hooked up to pull a loaded 18 wheeler what gear are you going to put it in?? So you are thinking what’s that got to do with canoes.  A bigger canoe is harder to move through the water (think barge with an 18 wheeler setting in it). The tandem canoe (think barge) is bigger so you will need a longer paddle to reach the water. The longer paddle changes the gear ratio in the wrong direction. 
I own and sometimes paddle a Bell Magic.  Many people describe a Magic’s handling as twitchy. Which means it tips that first few degrees real easy. The bigger you are the more you will notice the twitchiness. I let a 240 LB man paddle my Magic.  He had never paddled a solo canoe and was very uneasy in the Magic.  If you are over 6 Ft lowering the seat a couple of inches would make a lot of difference.  The magic has much better secondary stability.  I can stand up in it and paddle it in calm conditions. For most of my trips the magic is a bigger boat than I like and so most of my paddling is in a smaller solo. With your size the magic would be about the correct size boat but you would probably want the seat lowered.  I know large man finds it easier to get up with a higher seat position.  I went on a trip with a large man who had raised his seat 1&1/2 inches.  After we got him out of the 35 degree water he lowered it back down.