Communication and durability are the mainstays of both these phones, so lets us look at what these rugged phones are using to keep us in touch with the world.
Samsung Rugby: The Rugby is a GSM phone which means it can be used internationally, it supports the following range of frequencies -- 850, 900, 1800 and 1900, while 3G is supported via HSDPA 850 and 1900. Local connectivity is supported via Bluetooth 2.0 with AD2P and microUSB 2.0. You can use an 8 GB card, internal memory is capped at 130 MB.
The phone's camera shoots some pretty decent pictures considering it's a tiny 1.3 MP snapper. Pictures turn out clear and bright with a bit of over-exposure on strong colors, as a result colors look stronger then they are and textures turn out to be smooth and bland, but there is nothing deal breaking about the camera. You get a decent amount of options to play with such as -- a self-timer, brightness, white-balance, mosaic shot, panorama view, multi-shot and night modes. There is also digital zoom, though at the highest resolution (1,280 x 960) it is unusable.
Multimedia is not a strong point on this phone. It will play your music files (MP3, WAV and AAC+ formats) and videos (MP4 and 3GP formats) although barely, it's really not a pastime the phone was designed to accommodate. Videos play at a maximum resolution of 320 x 240, which is thankfully higher than the phone's native resolution. But you'll hurt your eyes watching stuff on the phone.
Features wise the Rugby owes most of its features to AT&T-- as it comes with My Cast 5 Weather, Mobile banking, Yellowpages, MobiTV and other services. The phone natively comes with a voice recorder, organizer, voice memo, predictive text input, alarm, calculator, calendar, JAVA and GPS.
Motorola Tundra: The Tundra has an identical set of connectivity options when compared to the Rugby. The only significant difference is the lower internal memory which is 100 MB. Although the official limit for this phone's external memory is 4 GB, it can easily deal with an 8 GB microSD card.
Although the Tundra comes equipped with a 2 MP camera, picture quality is under par when compared to the Rugby. Pictures turn out very fuzzy and washed out, everything looks like it's about to fade, or as there is a fog hanging over the scene. Washed out pictures combined with pixelated videos shot at a low resolution make this phone worse for wear when compared to the Rugby's camera. Shooting options are the same as well.
Media wise the Tundra is in the same jungle as the Rugby, same formats, same resolutions and to some extent the same music player, flip a coin over the media, you'll end up a winner/loser either way.
Features wise, the Tundra is playing the clone game again, the two phones borrow and swap features with each other, but the Tundra does offer easy PC syncing and mass storage services, keep that in mind.
Winner: Samsung Rugby