Mobile Review compares these two giants and comes to this conclusion:
To me the result turned out to be somewhat shocking – the W950i won by a marginal gap, yet a win is a win. Nevertheless I will allow myself a short note, so as to reassure our readers (and we would like to avoid criticism to some extent). Here is what this note is: if you are currently looking for a prime music handset, then both of the reviewed models should end up on our shortlist as either of them has got own merits. Over and above the pluses we listed annihilate the letdowns – for example I readily turn a blind eye to all shortcomings of my N91 for the great sonic experience it provides, design and materials used. Switching the parties, I can overlook pretty muffled sound output by the W950i, since it sports such a decent display, compact dimensions and a handful of tricks it has up its sleeve when it comes to radio and player applications. That is why I wouldn’t dare announce the champion here, in other words both devices have the upper hand against all the rest of solutions available on the market – in fact, there hasn’t been any offerings that could match these two, and I don’t count the N91’s update for one.
All I have to say is give me SDHC or give me death.
(I also think the N91 is ugly, but some of you might like it!)