There is no such thing as a 100% force driver — it's impossible to play anything with 100% force — 100% force is impossible to hold on even for some kind of body builder — not to mention highly dangerous.
I did a 5 lap time trial with 100% force feedback with my Simucube 2 Pro.
It's
doable and I'm far from a body builder, but it's still a very bad idea because:
Even if you set your game to 100% FFB and max amperage in True Drive, the theoretical max is still above that so if you crash or hit a very hard corner at high speed, you'll get "more" than 25 Nm as a signal, which will cause clipping.
During a 5 lap time trial, I heard the clipping warning 50+ times and I stopped counting.
It's very uncomfortable and your lap times will be miserable. You won't be able to grab as much of an apex as possible because you'll be worried about curb torque spikes. Especially in ACC, the somewhat "triangle wave" like curbs will be quite harsh and risk snapping the wheel out of your hands.
That being said, there's more reasons than that for the R1 to be better than the R2. While the
R1 was built to have fail safes from overloading the twin PSU's, it was also built
without a "peak only" overload current that the 450W Chinese PSU that they're using in the R2 has. It was built with the guarantee that two 280W Meanwell PSU's that have 12A of current
always. You won't have to worry about holding torque exceeding the operating range of the custom 450W PSU because the double 280W Meanwell PSU's are built to operate at 100% of the SC2 Pro's torque capability, which it was rated for 25 Nm.
Make no mistake, engineering wise the R1 is better built to handle holding torque of 25 Nm than the R2 is.
But there's another reason to have a higher torque rating even if you're not a "100% force feedback driver".
I discovered that the theoretical max might be 25 Nm for the SC2 Pro, but my experimental max was actually 25 Nm over 30 Nm (30 Nm max force with 25 Nm wheel force) in iRacing. As I said before, there's noticeable clipping. So actually I can run an SC2 Pro at about 20 Nm of overall max torque in iRacing and avoid clipping. So what this means is, an SC2 Sport will not be able to run 17 Nm of torque without clipping. Your actual max with an SC2 Sport will be around 13-14 Nm. And that gets REALLY close to how much torque I run my Pro at (I run between 50-55 Nm max torque which is about a 40%-50% ratio, meaning 12.5 Nm or so of torque).
There's not a lot of room there to be honest.
None of this matters because GD engineers have sort of admit that in recent firmware they have reduced the current max for
both the R2 and the R1 due to the R2 having a lower amperage PSU with peak current.
@Andrew_WOT has asked them maybe 5+ times if they reduced the power rating of the R1 because of the R2's PSU and they never answered him or they say something like "no one would ever notice the difference".