Both would be fine for watching HD movies - the Intel cards, either on the CPU or the Motherboard, will accelerate the video, and the CPUs are more than capable. From what I can tell, both are using the Core i3 graphics - if it just says "Intel HD" thats usually the case, the ones on the motherboard are usually called "GMA 4500" or "X3100". But for your use, I'm not really sure it'll make much difference either way. They're designed for general use - they wouldn't really cope with any modern games but that doesn't seem to be an issue!
Also, Packard Bell are now owned by Acer, so I wouldn't worry too much about the brand difference of the two machines.
Most manufacturers are phasing out Firewire support - these days its only useful for some types of External HDD and older DV Camcorders. Most new HD camcorders which record to a HDD or Memory Card use USB 2.0. HDMI may come in useful if you will ever want to connect to a HD TV.