A 25% more. That will be noticeable. I think I will get the Lumia next, I've got only 5 months left of N8 contract and Vodafone will automatically offer me a new phone for renewing with them for another 18 months. I hope they don't charge me 100€ or something for the Lumia though.
Screen is good enough for me. Will try to do 2 yrs with the 800. Will keep the n900, it has small hardware faults (charging on pc doesnt work anymore, some deep scratches) and good ones are going for 100 €, not worth the sell