Rims and tyres

Servus, I’m going to have time to get my Volvo S40 2.0D (136ps) new rims for the summer tyres. From the research here in the forum I have now decided on 17 inch rims, the question is now only which tire width. The website recommends 225/45 as tire size. However, from various forums I have that 215/45 or much better for the S40. Unfortunately I am a total beginner in this regard and wanted to ask experts here about the smarter choice here. And why are the 225/45 unfurnished 300e cheaper than the 215/45? I would like to lose little driving comfort and little acceleration. It’s about the following rims:https://www.felgenoutlet.lu/…/platin-p99-jetblack?…