How does the new Qantas A330-300 economy seat compare to the A380 economy, escape socially in terms of seat width?

How does the new Qantas A330-300 economy seat compare to the A380 economy, escape socially in terms of seat width? On seat guru its says 17inches compared to the A380s 17.5. Is this true?

As I've told many women over the years, half an inch can make a huge difference. The A380 feels substantially wider however my last trip, I scored a spare seat next to me but the arm rest wouldn't lift all the way up. It made the spare seat just a resting place for my jacket!

ive only flown the new A330 on SYDNEY to Melb. It feels like a typical A330 / 777 seat as far as room goes. The business product looked amazing!

(Christopher) that's the reason the new A333 seats are slighlty narrower... the armrests on the A333 nextgen recaro seats can now be raised fully to tuck flush between the seats. As stated the previous recaro seats on the A380 cannot be raised fully.

FYI (riley) you would have been on an A332 between SYD/MEL which doesn't have the nextgen recaro A333 seat..The A332s use existing refurbed seats (new padding/seat covers/colours).

Yes it was an A332 and it didn't seem new. 

Half an inch (you're revealing your age with Imperial measure) as a fraction of the whole increases proportionately from small to large. Where the baseline is small the half inch means a lot more I guess...

Yeah it's absolutely vital. Your first dollar is more valuable than your millionth! Let's not bring age into this!

I'm actually only 21