UltraMagnus,
A 'toy' boat is one that is typically sold commercially as a 'RTR' (Ready To Run) thingy which you have absolutely no control over how it's built, or of what. It's usually supplied with a very minimal radio system which is usually a very proprietary kind of thing (not much you can do with it except use with that particular model), and probably no choice in radio channels. If there's already one in use, you can't use yours.
A 'model' is usually just a kit that you put together. They range from extremely simple to things you don't even want to think about - lol. Usually are of wood, plastic, fibreglass, or some combination of all of those. Some are even partially built, you just finish them, sort of. Same range as you find with 'static' models, 'idiot' level to 'museum' stuff, right?
If you can build a static model you can probably build an R/C model. The biggest difference is mainly in stuffing the electronic stuff inside. After seeing a few typical R/C model set ups the idea sort of sinks in and then you just adapt to the particular model you are doing. There's really no mystery to the radio part of the whole thing. It can be a little confusing to start with but that's true of any new 'thing'. Same for the propulsion part (gas-petrol/nitro/electric). (I understand electrical stuff, combustion engines are a complete mystery to me. I like electric boats, naturally.) Just a matter of becoming familiar with what you want to use ('just', he says!).
As for the particular models you asked about, I haven't built any of them so you'd be wasting your time listening to me about them. I seriously doubt if any of them would be beyond your capability. Just depends on how 'adaptible' you are, or how well you can work around the problems, sort of.
If you didn't learn to 'cuss' with static models, you have a whole new learning experience ahead of you! Enjoy.
- 'Doc
(Which do you like the most? Get it.)