Clio 197 hp gains

Both measurement were done at the same dyno? If not, you cannot compare those.
Even to skip that, your m8s graph is to generous IMHO, when talking about whp, those are some crazy figures at the flywheel.

There's no way 173 whp is 216 @ fly, so first graph is BS. 2ng graph looks like came from Engine Dynamics, imo they're a touch generous but nothing overly so, and far less than a lot of places. The 191 is surely at the fly (does not say whp anywhere on it) and would seem about right.

It's just those transmission losses are 25% which is really high for a Clio and so very unlikely. You can't ever be sure going from wheel to fly (although some rollers do measure coast down losses which can be pretty accurate if intended), but I would hazard a guess of a fly fig to be more in the 'region' of say 205bhp. For what it's worth the graph shape is excellent so irrespective of figs is clearly on point.
The only whp fig I have from mine was when it was stock, 161whp/193fhp - which at 20% I think was also too high, but that was on a dyno dynamics and they do literally just add on a fixed percentage! Which is garbage and they're def better rollers out there than DD's frankly.