Although all these models have similar specs, the A730 is smaller. It is 4.4 inches long, 2.9 inches wide, and 0.7 inches thick (113 x 73 x 17 mm). It weighs about 6.7 ounces (190 g).
For comparison, the e800 is 5.3 inches tall, 3.0 inches wide, and 0.6 inches thick (135 x 76 x 15 mm) and weighs 6.8 ounces (193 g).
The hx4705 is 5.2 inches tall, 3.0 inches wide, and 0.6 inches thick (131 x 77 x 15 mm). It weighs 6.6 ounces (187 g).
The Loox 720 is 4.8 inches long, 2.8 inches wide, and .60 inches thick (122 mm by 72 mm by 15.2 mm). It weighs approximately 6.2 ounces (175 g).
The MyPal A730 has a 3.7-inch display and the Pocket Loox has a 3.6-inch display, while both the hx4705 and the e805 include 4-inch displays.
Every one of these has both a CompactFlash slot and an SD slot that supports SDIO.
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