Hello Tony,
Great question! I don't think I've ever seen Rebel specs for recommended paddler size/weight, so I can't steer you towards any actual published material. But I can share my own anecdotal experience, having sat in several models of these kayaks and paddling one this summer.
I stand 6'0" and weigh 165 lbs depending on how much beer I've been drinking. I have a tall, slender build - think "swimmer." 32" waist and Mens size 11 US feet. In jeans, I buy a 34" inseam, but a 33" would be perfect, so relatively long limbs.
For me, sitting in the TOC is comfortable, but not roomy like a European/British touring kayak. For my size, the TOC would be my choice for longer day paddles and/or carrying lightweight gear for overnight trips (if I didn't also have a touring kayak). Compared to the Ilaga, the TOC has slightly higher decks, which allows for more bend in the knee, larger feet, and more internal stowage. The TOC is also 2" wider than the Ilaga. So for someone larger, or taller, or with bigger feet, or who wants a bit of comfort and the capacity to carry gear, the TOC a great choice. One note: compared to a European/British style touring kayak, it's still a low volume kayak -- narrower with lower decks -- so easier to roll.
I also own and have paddled an Ilaga, which, for me, has been my dedicated rolling kayak. It is lower volume, narrower, and has lower decks. For me, it's great for rolling and the occasional short paddle (about an hour). It only has two hatches, so less capacity for carrying gear. Since the decks are lower, it's a bit of a squeeze with my size 11 feet, and I have to sit toes-out to fit. For rolling, I don't use the foot pegs, so it's not a big deal.
Both kayaks benefit from being outfitted with a masik (thigh brace), especially for rolling.
If you have more questions or want to discuss further, let's take the conversation to email so we don't fill up other member's Inboxes with New Post notices.