Lightened flywheel in terms of difference/benefit per pound spent is awsome.
The engine is much freer revving gear changes at high rpm become better as engine speed dies so much quicker without the inertia of the very heavy standard flywheel.
If there is a downside it is that you may need to use a few hundred more rpm when pulling away, or slip the clutch a tad longer as you let it up, as there will be less inertia to assist when pulling away, but once moving it's all plus points.
The point I am trying to make about power and torque is your car could feel much more powerful/torquier to you with say for example a smaller turbine housing where it will boost much earlier, so in everyday driving would be "better", some would prefer this, some like screamers, bit like a civic type r a awsome car in it'sown right, bit like a 2 stroke bike nothing nothing nothing shit too much, nothing power wise, depends what you like a engine with better low down torque will feel faster in everyday driving, but won't at much higher speeds.
If wanting overall improvements I wouldn't overlook the advantage a live map session will give you, chips by their nature can't exploit the ultimate out of every car they're fitted to, but mapping does just that, bad example but my ea chip over a map on a different ecu saw me pick up 30odd bhp for 9.5psi LESS boost, yes the ea chip was that bad, had less bhp on ea stage3 than GGR stage one, despite being some 10 psi higher boost, hard to believe I've still got the printouts that show it.
Doesn't matter whose chip etc you go with I'd seriously get all your mods done then live mapped, be the best money spent in terms of refinement and running.
tabetha