One, I'm pretty sure I read LA pointing out they had much more knowledge of 360 than PS3 and SWTFU and Fracture where their big learning experiences.
Two, while I firmly believe (from what I've observed myself) that for the most part with common engines, tools, each console produces games that look essentially the same, it's no secret that 360 has a much easier SDK to develop with. Right or wrong Sony is used to delivering the HW and basic SDK and leaving it to developers to build out their abilities - MS made a point of delivering a better SDK to attack this as a point of weakness
Three, I'm also of the opinion that due to their respective architectures and the fact most 3D engines for consoles today are actually based on experiences / tech principles derived from years of such engines on PC, the 360 tends to have an edge with such games unless extra effort is put into the PS3 version (although this has been steadily reducing and probably by early 2009 360 and PS3 will finally be more or less at parity for such games.
Four, don't assume a developer will spend more than they feel they have too. Trophies are not mandatory yet and some developers are choosing to simply ignore them for current releases (I think they become mandatory from 2009 onwards). Use of Rumble is not mandatory, nor is use of custom soundtracks. The PS3 (if you buy a Rumble Dualshock) can support all of these but developers don't have to add them, and some won't to save money.
Try to be reasonable... its easier than you think...