One thing you need to keep in mind, whatever brake system you go with: Your Fusion Hybrid probably has whats called 'active braking'. I know my 2013 Fusion hybrid does. Meaning, when towing it, power brake assist stays on. That being the case, some brake systems could over-brake your Fusion (put too much pressure on the brake pedal) if they're not designed to work with active brakes. This can do all kinds of damage to your brakes.
Not sure if RVi or the Patriot system would be better with a vehicle that has active braking, you need to check and find out on that. They probably both have settings you adjust appropriately to accommodate for such. Of the two of them, though, I think I'd prefer the RVi just for how much smaller and compact it is.
However, as I said it in your last post on this subject, I'll say it again: If it was me, I'd skip BOTH of those obscenely expensive electronic box systems you're thinking about, and get you a
ReadyBrake unit. Nothing to have to put in and take out, no electronics to worry about fouling up and burning up your brakes, just a simple, no-nonsense cable operated brake system that simply works. And, costs CONSIDERABLY less than the two systems you mentioned. Oh, and it also works just fine with active brakes, without having to adjust anything for such. If you haven't got a tow bar yet, you can get their ReadyBrute Elite Tow bar and ReadyBrake system package deal, and you get both the tow bar AND their braking system for almost the same as you'd pay for just a tow bar from anyone else. Save you a good $1000 or so right there. IMO it just can't be beat.