I came across a review of these two Philips VoIP Phones and thought I'd provide you a cliff notes version of the review.

The VoIP433 provided users with a "true plug-and-play" experience with Windows Live Messenger and the phones automatic contact book provides an up-to-date contact list. However the screen is considered to be one of the worst ever seen on a handset. It's 98x67 pixel LCD is only capable of showing 4096 colours and the low resolution can make it hard to read.

Features:
Call on hold
Call waiting
Battery life of 10 hours talk time and 100 hours standby

The VOIP321 is a Skype phone that requires the installation of a driver and small application program. This runs in parallel to Skype and your computer to provide the phones interface. After installation it provides a small icon in the computers system tray.

Similar to the VOIP433, the VOIP321 is easy to use and offers a dedicated Skype button. This button will initiate or answer a call from Skype, SkypeIn (from a standard phone) or SkypeOut (to a standard phone).

The VOIP321 battery life also offers 10 hours talk time or 100 hours standby time. Both handsets offer a speakerphone option allowing you to be hands free when making longer calls.

The difference between these two handsets is functionality. Windows Live Messenger you only have the call to landline feature if you are in the U.S. While with Skype you have SkypeIn and SkypeOut services. The choice of which Instant Messaging platform you perfer could be the deciding factor in your choice between these two phones.

Pros:

• SkypeOut and SkypeIn with Philips
• VOIP321Separate base and handset charging design
• Dedicated Skype and Windows Live Messenger keys
• Full integration

Cons

• Low resolution LCD on the VOIP433

Click here for an extended review and more pictures of the VOIP433 and VOIP321.