Build quality is no better, neither is image quality (same sensor)
and "grip feel" is completely subjective ( I prefer the Pentax, but
liked the Canon 350D best of all, for what it's worth).
I keep hearing the Nikon and Sony has the same sensor. I read
different. Heres a quote right from Phils review.
"10 megapixel APS-C CCD
We fully expected and Pentax delivered, ten million pixels for
their new flagship digital SLR was an absolute (marketing)
requirement. Interestingly this CCD has slightly different
specifications than the Sony unit used in a few other ten megapixel
digital SLR's so we can't be sure of its origins. It's 23.5 x 15.7
mm with 10.75 million total pixels, 2-channel read-out. "
Looks different to me and all the good photos I seen from the K10D
look superior.
It's the same sensor. Any sensor design, not just this one, is
actually a family of circuit variations. The sensor area design is
the same, but then the exact size, manufacturing tolerances,
readout circuitry and other support circuitry is offered in various
versions at different pricepoints and volumes. It's the same with
any complex IC design.
I agree that there is an image difference in RAW, but that is not
the sensor itself. Pentax seems to have struck a better balance
between noise level and detail than Nikon (whose images tend to
look a bit smeared out at high detail). The difference is not
enough to make any meaningful difference in actual use, of course;
we're solidly in pixel-peeping territory here.
--
Japan:
http://www.lucs.lu.se/people/jan.moren/log/current.html
Images:
http://www.flickr.com/photos/jannem/