IIRC, Yahoo HPC group has a picture with MP and Jornada and Sig3 in same picture.
My thread about my Smartbook has pictures comparing it to the Jornada 728 and C1MV picturebook, and another set of pictures comparing it to the Mobile Pro 780.
The models you mentioned are running HPC Pro, which comes with IE3. For today's webpages, you probably want at least HPC2000 with IE4. If you visit fancier websites, you want CE .net with IE5 or IE6.
Other functions you mentioned are pretty common among all HPCs