I would say my williams gives you more feel when driving then the 182, but then my williams is standard (ish) and the 182 is not so much standard lol
Mine are all slightly different so i will give you a quick run down.
The williams is lightly modifed - exhaust filter and polybush all new suspension and mounts (drives like it should)
The 182 is 182FF both cup packs, forged low comp engine and rotrex super charged so has a little bit more power then standard :S actually nearly double as its running hi boost, and coilovers polybush uprated engine mounts etc
The Dimma is running a williams engine turbo charged and has a wizards of nos direct port kit with controller (currently 100shot) forged but on low boost (its a project in progress, engine is speced for hi boost, just have to uprate a few things first)
I also have access to a 182ff in standard condition but has original mounts etc so it a little sloppy (90k on clock)
For driving they are both very good but do not feel like the same car at all, I put all new standard suspension and poly bush on and it drives lovely, you can really feel it in the corners however the poly bush squeeks.... very weird.
The one thing you can notice on the williams is if you go into a corner a little to fast is that the back gets very light and i dont get that so much on the 182, it will get light but doesnt seem to be as bad as the williams
Now my 182 is running coilovers so you can push it a little faster and it will stay flater in the corners and it will get the power down better out of corner.
In driving terms i would say they are equally fun, but the sound in the williams is far superior lol it just has a nicer note (to my ears anyway)
In terms of power delivery, the williams 'feels' like it really gives you a lot more low down then the 182 which makes it feel like a much nicer drive when it comes to giving it some.
However the 182 actually does move much like the williams, i just think you dont feel the low down kick because at the top end it doesnt drop off as much as the williams, so its much more of a liner acceleration till 4k / 5k when the 182 really comes on song.
So i would say it depends on how you like to drive really the Williams gives you what feels like a very torquey kick when you set off, with that power dropping out after about 6k, but the 182 seems to pull on through right to the top.
Cornering, i would say i feel more confident in the corners with the williams, but on the exit i can get the power down better in the 182.
As an everyday run about, the williams has to lose out to the 182, mainly due to the refinement in the 182's climate control and refinement win on that for me. the williams always feels like its ready for a fight and it eurges you to push that pedal lol, the 182 you can actually forget that your in the 182 some times it just becomes an everyday driver.
I also have a Dimma, and the williams and 182 beat this hands down, on the standard 1.8 it is dead, the low down torque of the williams is not there, at the highend its a screamer but you need to keep it in the high revs or it loses some of its guts, now with the f7r turbo its a different beast
So my overall conculsion is both cars are very good fun when you drive them (im bias i like clios lol), but the williams does not like to be driven gingerly,it makes you want to drive it hard and gives you a really good amount of feed back, where as the 182 you can drive it hard if you like and it will comunicate about 90% of what you feel in the williams but it can be driven everyday without the need to push it.
So track car for me would be the williams or a valver hybrid (maybe even a f4r engine) but everyday which still has a fun drive i go for the 182