I think there's no question that it takes a considerable amount of time to adjust from one controller to another - weeks, not hours- so it's not reasonable to expect Estadios to be up to speed after a few hours.
However, I'm not sure Alan's interpretation is quite correct. I can't comment on whether there is an actual "assist" for the pad, but I can say there's definitely a
lack of precision with the wheel. There's a "dead-zone" of a few degrees with a G25 that means anytime the wheel rotates through the central axis, you're not quite sure where exactly the wheels are pointing.
This can be experienced, to some extent, at many points on every circuit. An example would be the first corner at Mugello, where you want the car's tires to be right on the left-hand curb as you approach the corner. Because of the play in the wheel, it's easy, accidentally, to come in a little & lose the best line, or (much worse), slip the wheels over the curb & lose control of the car. The effect is most pronounced at fast chicanes - like the second chicane at Monza

, or the last chicane at Montreal

- where the wheel swings through the central axis 3 times - it's very hard to feel
exactly where the car is pointing as you negotiate the corner, which makes it easy to lose contrtol, or at least lose time. In this sense, it is quite unlike GT5P, where the wheel inputs are very, almost mathematically, precise.
All this sounds like it would make SCC terrible with a wheel, but in fact it is very enjoyable. This is because the slight vagueness of the steering adds to the excitement, unpredictability & sense of "danger", which (presumably) is a big part of RL racing, & which (for me) is lacking in GT, with it's very precise & somewhat clinical physics & presentation. Combined with the more physical feel of the FFB, the stronger sense of weight transfer & the necessity to correctly time gear-shifting, it makes racing in SCC a more physically demanding (& satisfying) experience compared to the more detached, cerebral experience of driving in GT5P.